So I am nearing what I assume is the end of the story. I have a mission to hunt 3 Leviathans near Yelan.
Those guys are VERY annoying, with non-stop bonus actions wiping out half my party each time they get a turn.
So I decided to vent a little bit and load up every Ark I had with a death revenge effect, no matter how low level they were.
The first Leviathan attacked with a single target strike and killed a Seaspine. He took the 24 damage from Payback. But there was no poison effect indicated for Volatile.
The Leviathans proceeded to kill every revenge effect unit I had loaded up, and none of them triggered. These included multiple of each:
Chopperbug
Seaspine
Prickster
Blockadus
GremKnight
Orcow
Plasmodious
Cryoling
Some were supposed to trigger when hit, many were supposed to trigger when killed. Other than the initial Seaspine thorn armor effect… NOTHING happened to the Leviathans. I happen to have one Leviathan, so I know they aren’t immune to dozens of effects by nature. So is this a bug, or an un announced special “boss mode” bonus for them like the insane bonus turns must be (damn things don’t even shine as S class)
EDIT: Tried again with a different arrangement, and included a few Skullwraith this time. I was able to use a move myself which should poison them, and no poison happened. I also used the death roulette, and it hit one of them to no effect. So there seems to be a “bosses are immune to X effects” which should REALLY be documented. At least for Death Roulette and Doom, which so far have almost universally been useless against bosses.
Yes, it makes sense for auto-kill moves not to work on them, but that doesn’t preclude the need to document it SOMEWHERE for the user to know for sure.