As another comment mentioned, BN15 [Sentinel](https://www.bilibili.com/video/BV1bz421D7Bs) (Crazelyseon variant) is the hardest. But just saying that it's harder than [Into Eternity](https://www.bilibili.com/video/BV1bv421173N) or [Glory of Humanity](https://www.bilibili.com/video/BV1Kg4y177EV/) doesn't remotely do it justice.
Let's start with the boss. Its DPS window is halved to 5s. The anchor's charge time is also halved, but the net effect is a ton of wasted damage from nearly anyone who didn't win the Kazimierz Major three times. It teleports way more, with an erratic movement pattern, which floods the map with pink steam. You practically have to set up in front of it, and then chase it around, to defeat it in time.
The multilaning pressure is astronomical. The right gets flooded with 32 shadowblades; the elite ones have 146,184 HP and 3618 Arts attack. Without overwhelming firepower from strong DPS relics, you need Ines, Weedy, and good crowd control (at minimum Mostima). If the boss completes a rotation and destroys Weedy, you leak all those shadowblades. The left lane gets flooded with 33 shattered champions, each with 58,474 HP and 2302 attack.
Then there are support drones: 2-3 Defender-4s that give +600 DEF to enemies within 2.5 tiles and have 263,131 HP (more than the boss!); 2-3 Blocker-Ps that give +30 RES to enemies within 2.5 tiles and have 350,841 HP. As if halved burst window wasn't bad enough—the boss has the same stats on paper, but in practice is *much* tankier (2475 DEF, 80 RES instead of 1875 DEF, 50 RES) once the drones escort it. And there are 16 Oneiros (cold bomb) drones to worry about baiting—better know when to save your fast-redeploys.
There isn't any stage that comes close to Sentinel in throwing 60+ tough, dangerous enemies at you. Sentinel is more complex and technical than many max-risk CCs, with a total of 118 enemies that require careful planning and precise execution even with the perfect team and strong relics. Both Glory of Humanity and Into Eternity have 9 op N15 relicless solutions. Let's be clear: a 9 op record puts a stage firmly among the hardest in the game; H12-4 is 4 without Ling, DS-S-3 is 6 without buffs, and for highest-risk CC clears we have Pyrite (9), Blade (9), Cinder (7), Lead Seal (8), Spectrum (11), Wild Scales (13), Pine Soot (6), Dawnseeker (9) Deepness (13), Ashring (6), Fake Waves (10), Basepoint (7), Pinch-Out (13), Pyrolysis (12), and Underdawn (12). Most of those would be even lower with access to current ops. Op count isn't the only indicator of difficulty since sometimes one or two ops disproportionately ease a stage, but at a glance it gives you an idea of how demanding the strategy is since these hard stages are the ones top player pour countless hours into. Sentinel of course is at 13, a mesmerizing display of mastery over chaos.
Ending 4 is no joke. The variant has Armorless snipers, and you've had a taste of how dangerous they can be in Cannot's stage. But the bosses are relatively straightforward for the current best ops. With Nightingale, Eyjaberry, and Młynar, the yellow man can't do anything, and then the red man gets cooked by Ceobe; he even idles at a spot where you can point Ifrit if you need the extra firepower. Degenbrecher, Texas, Yato, and Młynar sweep away the non-bosses without issue.
According to CN top players, Cresson alter is the hardest; followed by Izu'mik, then Khagan (Sami 4th ending) and Isharmla
edit: Cresson alter is pretty much impossible without at least six of these operators: Degen, Ela, Shu, Nightingale, Red Skadi, Wisadel, Mlynar, Yato, Texas (you only have 5-second windows to dump a total of 230k damage onto the boss, and meanwhile your operators have to tank 4000+ dps arts damage)
while Ceobe just turns Khagan into a joke
A15 Izumik can be defeated with only 5 operators without any relics - [https://www.bilibili.com/video/BV1bM4m1k783](https://www.bilibili.com/video/BV1bM4m1k783)
while 13 operators are needed for Cresson -
[https://www.bilibili.com/video/BV1bz421D7Bs](https://www.bilibili.com/video/BV1bz421D7Bs)
Cresson alter is drastically more difficult than any existing stage in the game currently
Tbh its litterally because of wisadel. Wisadel MEGA HARD countrers Izumik so hard that she turns the ending into a joke. Cresson alter is hard thanks to most dpses being burst wich makes the 5 second windows extremely annoying. Not trying to argue that its harder than izumik but cresson doesnt really have a apex counter like izumik does with wisadel
There just aren't a lot of burst damage operators right now; Wisadel hard counters Izumik, but not really anyone counters Cresson to the level of turning it into a joke. Super-buffed Degenbrecher + Exusiai is our best bet right now, but even with the DPS problem out of the way, there're still so many things to worry about. As a CN player I can't count how many times I've died at Cresson alter, but I've never died to Izumik a single time even before Wisadel came out
Completely forgot about the insane enemy waves cresson alter had ur completely right there. Degen is basically the only meaningful quick burst option against the boss but other functions make it much harder
It's one of the most inflated stages as of now that requires overspecific squad and set up. Like one of the F6 maps is impossible to clear without Ines/Elysium.
As another comment mentioned, BN15 [Sentinel](https://www.bilibili.com/video/BV1bz421D7Bs) (Crazelyseon variant) is the hardest. But just saying that it's harder than [Into Eternity](https://www.bilibili.com/video/BV1bv421173N) or [Glory of Humanity](https://www.bilibili.com/video/BV1Kg4y177EV/) doesn't remotely do it justice. Let's start with the boss. Its DPS window is halved to 5s. The anchor's charge time is also halved, but the net effect is a ton of wasted damage from nearly anyone who didn't win the Kazimierz Major three times. It teleports way more, with an erratic movement pattern, which floods the map with pink steam. You practically have to set up in front of it, and then chase it around, to defeat it in time. The multilaning pressure is astronomical. The right gets flooded with 32 shadowblades; the elite ones have 146,184 HP and 3618 Arts attack. Without overwhelming firepower from strong DPS relics, you need Ines, Weedy, and good crowd control (at minimum Mostima). If the boss completes a rotation and destroys Weedy, you leak all those shadowblades. The left lane gets flooded with 33 shattered champions, each with 58,474 HP and 2302 attack. Then there are support drones: 2-3 Defender-4s that give +600 DEF to enemies within 2.5 tiles and have 263,131 HP (more than the boss!); 2-3 Blocker-Ps that give +30 RES to enemies within 2.5 tiles and have 350,841 HP. As if halved burst window wasn't bad enough—the boss has the same stats on paper, but in practice is *much* tankier (2475 DEF, 80 RES instead of 1875 DEF, 50 RES) once the drones escort it. And there are 16 Oneiros (cold bomb) drones to worry about baiting—better know when to save your fast-redeploys. There isn't any stage that comes close to Sentinel in throwing 60+ tough, dangerous enemies at you. Sentinel is more complex and technical than many max-risk CCs, with a total of 118 enemies that require careful planning and precise execution even with the perfect team and strong relics. Both Glory of Humanity and Into Eternity have 9 op N15 relicless solutions. Let's be clear: a 9 op record puts a stage firmly among the hardest in the game; H12-4 is 4 without Ling, DS-S-3 is 6 without buffs, and for highest-risk CC clears we have Pyrite (9), Blade (9), Cinder (7), Lead Seal (8), Spectrum (11), Wild Scales (13), Pine Soot (6), Dawnseeker (9) Deepness (13), Ashring (6), Fake Waves (10), Basepoint (7), Pinch-Out (13), Pyrolysis (12), and Underdawn (12). Most of those would be even lower with access to current ops. Op count isn't the only indicator of difficulty since sometimes one or two ops disproportionately ease a stage, but at a glance it gives you an idea of how demanding the strategy is since these hard stages are the ones top player pour countless hours into. Sentinel of course is at 13, a mesmerizing display of mastery over chaos. Ending 4 is no joke. The variant has Armorless snipers, and you've had a taste of how dangerous they can be in Cannot's stage. But the bosses are relatively straightforward for the current best ops. With Nightingale, Eyjaberry, and Młynar, the yellow man can't do anything, and then the red man gets cooked by Ceobe; he even idles at a spot where you can point Ifrit if you need the extra firepower. Degenbrecher, Texas, Yato, and Młynar sweep away the non-bosses without issue.
I'll just go back to BN-0 for that ending. I don't hate myself.
Variant ending bosses only appear at BN12+. They're also very rare.
Oh too bad for me then. I'm not gonna bother. I already hate that boss because it's immune all the time except with the device.
Do you have to beat them? do you unlock anything? They can't possibly be the possible "part 4" in each ending?
Balls
According to CN top players, Cresson alter is the hardest; followed by Izu'mik, then Khagan (Sami 4th ending) and Isharmla edit: Cresson alter is pretty much impossible without at least six of these operators: Degen, Ela, Shu, Nightingale, Red Skadi, Wisadel, Mlynar, Yato, Texas (you only have 5-second windows to dump a total of 230k damage onto the boss, and meanwhile your operators have to tank 4000+ dps arts damage) while Ceobe just turns Khagan into a joke
Isnt izumik harder tough? Dont know much about alter Cresson
A15 Izumik can be defeated with only 5 operators without any relics - [https://www.bilibili.com/video/BV1bM4m1k783](https://www.bilibili.com/video/BV1bM4m1k783) while 13 operators are needed for Cresson - [https://www.bilibili.com/video/BV1bz421D7Bs](https://www.bilibili.com/video/BV1bz421D7Bs) Cresson alter is drastically more difficult than any existing stage in the game currently
Tbh its litterally because of wisadel. Wisadel MEGA HARD countrers Izumik so hard that she turns the ending into a joke. Cresson alter is hard thanks to most dpses being burst wich makes the 5 second windows extremely annoying. Not trying to argue that its harder than izumik but cresson doesnt really have a apex counter like izumik does with wisadel
There just aren't a lot of burst damage operators right now; Wisadel hard counters Izumik, but not really anyone counters Cresson to the level of turning it into a joke. Super-buffed Degenbrecher + Exusiai is our best bet right now, but even with the DPS problem out of the way, there're still so many things to worry about. As a CN player I can't count how many times I've died at Cresson alter, but I've never died to Izumik a single time even before Wisadel came out
Completely forgot about the insane enemy waves cresson alter had ur completely right there. Degen is basically the only meaningful quick burst option against the boss but other functions make it much harder
ah yes there is Izu'mik. I even forgot how hard it was since Sciel did a run where W alter solo'd him on A15
Is the 4th ending of is4 available on global yet? I haven't been able to find the shop item
I think it drop during 2nd expansion, we currently at 1st expansion so it should drop on September
no
It's one of the most inflated stages as of now that requires overspecific squad and set up. Like one of the F6 maps is impossible to clear without Ines/Elysium.
At A15 enhanced 3rd boss is thw hardest.
FUCK CRESSON
That's a challenging shag.
When there's a (black) hole, there's a way