I don't see this addressed in any FAQ entries, so I wonder if anyone has heard this question brought up before, and if an official or close to offical answer was ever presented:
Bathe In Blood, a DElf card from Assault on Ulthuan, states that it must be played on a DElf unit, and "sacrifice that unit at the end of the turn". Since the card does not state that you must control the chosen DElf unit, I could essentially play Bathe in Blood on an opponent's DElf unit. However, I can only imagine doing so in order to get it sacrificed at end of turn. But since I am the one playing Bathe in Blood, the clause about sacrifice is refering to me, and as far as I understand this game and what sacrifice means in real life, a player cannot sacrifice another player's unit. So is it supposed to be impossible to play Bathe in Blood on an oppenent's unit but not expressly implyed by the card wording, or did the design team probably think that the card wording would make it absolutely undesirable to do so anyway (forgetting that future cards and strategies could change that)?