I'm taking this information from the spoiler that was posted.
Scheming Cultist
[Chaos - Unit] 3CC
1 Power // 2 HP
- Cultist.
- Action: Spend 1 resource to deal 1 damage to target corrupted unit.
How would this interact with Deathmaster. For example, player 1 corrupts deathmaster to destroy scheming cultist, player 2 responds by using 2 resources to deal 2 damage to the deathmaster. No other actions are played. Resolving first in last out, the Scheming cultist kills the deathmaster, but does the scheming cultist live or die?
Two arguments are, one, the deathmaster ability was already on the stack, so regardless if it left play, it still triggers and kills the scheming cultist or two, the scheming cultist kills the deathmaster and now it's unable to use its ability to kill the cultist.