[Snake]

I think if there's an enemy Redtail vs an enemy Omina, both their 'every round' passives should be coin flipped. If one wins, their passive works and the enemy's passive does not work, and vice versa.

So a Redtail's dice would fail, as the Omina drains its luck, or the Omina's drain would fail, as the Redtail's just this lucky.