The Armour of Russ

This model has a 4+ invulnerable save. In addition, at the start of the Fight phase, choose an enemy unit within 1" of this model. That unit cannot be chosen to fight in the Fight phase until all other units able to fight have done so. If the target unit has an ability that allows it to fight first in the Fight phase, it instead fights as if it didn’t have that ability. If both players have units that cannot fight until all other units have done so, then alternate choosing which of those units to fight with, starting with the player whose turn is taking place.