Smite the Deathless

Smite the Deathless deals 3 damage to target creature. That creature loses indestructible until end of turn. If that creature would die this turn, exile it instead.

The Lord of the Rings: Tales of Middle-earth

If Smite the Deathless doesn't deal damage to the target creature (perhaps because that damage was prevented), the additional effects will still apply. It will still lose indestructible, and it will be exiled instead of dying that turn.

The damaged creature will be exiled if it would die for any reason that turn, not just if it dies due to damage from Smite the Deathless.

You can target a creature that doesn't have indestructible with Smite the Deathless. It will still be exiled if it would die this turn.