Iax and Ior, Chaotic Dualities

Flying, haste
Whenever Iax and Ior, Chaotic Dualities enter
the battlefield, choose heads or tails. Flip a coin.
If you lose the flip, replace all instances of "target
player" and "they" on this card with "you."
—If {u}{u} was used to cast spell, tap all non-land permanents target player controls. Put a stun
counter on all tapped permanents they control.
If {r}{r} was spent, deal 3 damage to target player
and each permanent they control.