Hmm, took a look at the "single trigger for simultaneous damage" list, it looks like the current implementation has some frustrating limitations that are difficult for me to work around:
- Cards that say "whenever...deals/is dealt damage, you <do something> that much (e.g. gain that much life, whatever)" can't be implemented with CombatDamageDoneOnce/DealtOnce, since these triggers don't propagate the actual total damage dealt by a given source to a given target, and it's kinda counterintuitive how exactly to hook that up :/
- For other cards, it seems to sometimes work and sometimes not work, which is also frustrating. For example, for cards like
Fungusaur, switching to a double DamageDone/CombatDamageDoneOnce setup seems to work just fine. However, for cards like
Shriveling Rot (apparently the ones that add triggers to other things), it doesn't work well and two triggers fire at the same time anyway. Can't figure out why

It looks like the whole "damage done" trigger system needs a rework, I wish someone could help out with that, since I don't really have a good idea how to do this best.
Granted, some cards can probably be patched up similar to the
Enrage mechanic (e.g.
Fungusaur-like cards). But most of the others (like, two thirds of the list) will not work under this setup without a rewrite :/
- Agetian