When using Convergent Mutation to target a unit like Ravenbloom Student (which gains +1 might when you play a spell) or Darius (which gains +2 might when you play a spell), does their ability trigger before or after the mutation resolves, and what is the final might value?

Ruling: A spell only counts as played after it completely resolves. Therefore, Ravenbloom Student and Darius trigger after Convergent Mutation finishes resolving, not during it.

Sequence:

• Convergent Mutation resolves completely, setting the target unit's might to match another unit's current might
• Only after the spell fully resolves does it count as "played"
• Then Ravenbloom Student or Darius triggers, adding their +1 or +2 might respectively

Nuances:

• If you target Ravenbloom Student with Convergent Mutation to copy a 5 might unit, Student becomes 5 might, then triggers to become 6 might
• If you target Darius to copy a 5 might unit, Darius becomes 5 might, then triggers to become 7 might
• If you increase another unit to match Ravenbloom or Darius's might, it copies their current might before they trigger, so the copied unit stays at the lower value while Ravenbloom/Darius then increases
• If a spell is countered, it does not count as played
• Convergent Mutation only lasts until end of turn (this is a printing error on the English version with official errata)