If a unit with Cleave is moved away from the battlefield during combat (via Ride the Wind after taking damage from Ray), does it die immediately since it loses the +3 might from Cleave's Assault before healing?

Ruling: The unit dies. When it leaves the battlefield, it loses its attacker designation during cleanup, which removes the Assault bonus from Cleave. The unit then dies in a subsequent cleanup due to having damage equal to or exceeding its base might.

Sequence:

• Ride the Wind resolves, moving the unit away from the battlefield
• Cleanup occurs, removing the attacker designation since the unit is no longer at the battlefield where combat is taking place
• The Assault bonus from Cleave becomes inactive
• A second cleanup occurs, which kills the unit due to lethal damage

Nuances:

• If the unit is moved to another battlefield where it would contest, it does not immediately gain attacker designation. The ongoing combat must fully resolve first before new designations can be added at other battlefields.
• A unit moved to a contested battlefield will only gain attacker designation when that staged combat opens, which requires the turn to be in a neutral open state.