If Ursine Monstrosity isn't forced to attack the chosen player for one of the above reasons but can still attack, you may choose to have it attack another player, a planeswalker, a battle, or nothing at all
You choose one of them and exile it
The other just stays in exile
The ability allowing it to be cast out of exile is only added when the instant or sorcery adventure resolves if the creature is exiled, or the spell is countered-and-exiled through something like Faerie Trickery, it's not coming back
Card Set(s) -ONE PIECE CARD THE BEST- [PRB-01] CARD VIEW OP05-034 | R | CHARACTER Baby 5 Attribute Special Block icon 2 Effect [Activate: Main] (You may rest the specified number of DON
Your opponents will want to remove it immediately, or else risk constantly being forced to wait two turns before their lands can untap