If a Wielder with 4 Might takes 3 damage from Hexray, then has its Might reduced to 3 by Stupefy, does it die?

Ruling: Yes, the Wielder dies. When Stupefy reduces the Wielder's Might to 3 while it has 3 damage marked on it, the Wielder has damage equal to its current Might, causing it to be killed during the cleanup phase.

Sequence:

• Wielder starts at 4 Might
• Hexray deals 3 damage to the Wielder (now 4 Might with 3 damage)
• Stupefy reduces Wielder to 3 Might (now 3 Might with 3 damage)
• During cleanup phase, the Wielder has damage equal to its Might and is killed
• The defending Poro survives because the Wielder died before combat damage could be dealt

Nuances:

• Stupefy doesn't directly deal damage, but reducing Might can cause a unit with existing damage to meet the threshold for being killed
• Units are killed when they have non-zero damage marked on them equalling or exceeding their Might