If Yi has 2 units at the start of combat but during the showdown one unit is moved back or killed, does Yi's legend passive activate? Also, does Yi need to select which unit to buff before the cycle starts?

Ruling: Yi's passive is constantly checking whether the condition is met. If Yi starts with 2 units and that number drops to 1 defender during combat, the bonus activates. Yi does not select a unit - it's a passive bonus that is either in effect or not.

Sequence:

• Yi checks his passive condition continuously throughout combat
• When the number of defending units drops to 1, the passive bonus automatically applies

Nuances:

• No selection is required; the passive is automatic based on current game state