When Dr. Mundo (6 might from 0 cards in trash) is attacked by Remorseful Yasuo (with 'When I attack deal damage equal to my might' ability), and two Stupefies are played in response, does Mundo gain +2 might from those Stupefies entering the trash before Yasuo's attack ability resolves?

Ruling: Dr. Mundo gains +2 might from the Stupefies before Yasuo's attack ability resolves, bringing him to 8 might and allowing him to survive.

Sequence:

• Both players pass priority and the chain begins resolving
• First Stupefy resolves and goes to trash (Mundo now at 7 might)
• Second Stupefy resolves and goes to trash (Mundo now at 8 might)
• Yasuo's "When I attack" ability resolves, dealing damage based on his current might

Nuances:

• Spells enter the trash after they execute/resolve
• Dr. Mundo's might passively increases as cards are put in the trash area
• The chain resolves in reverse order, so spells resolve before triggered abilities that were placed on the chain earlier