Naomi, Free Radical

Suspend 3 - {1}{w}{r} (Rather than cast this from your hand, pay {1}{w}{r} and exile it with one time counter on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)
Whenever damage is dealt, if Naomi is in exile, put a time counter on it.
Pay 1 life, remove a counter from Naomi: Prevent 1 damage to any target.