Does Wielder of Water get +2 might from its ability and +2 from Yi when targeted by Falling Star (a spell cast outside of combat)?

Ruling: No, Wielder of Water does not get the +2 might bonuses when targeted by Falling Star cast from hand. Since it's not a combat (not attacking, just casting a spell), the unit is not a defender and remains at base might.

Nuances:

• This applies when the spell is cast from hand without a chain or showdown
• The bonuses only apply during combat when the unit is actually defending