If Darius Trifarian is the first card of the turn and you play Challenge to fight a 5 might enemy, does Darius get his +2 might before or after the spell resolves?

Ruling: Darius gets the +2 might after Challenge resolves. Both units will be 5 might when they fight, so they both die.

Sequence:

• Challenge is played and resolves
• The fight happens (both 5 might units die)
• After Challenge finishes resolving, "when you play" triggers occur
• Darius would get +2 might at this point (but is already dead)

Nuances:

• "When you play" triggers happen after a card's effects resolve, not when the card is put on the chain
• A card is only considered "played" once all of its effects have resolved