Ahri, the Nine-Tailed Fox

Prowess, Bushido 2
Whenever you cast an instant or sorcery spells, put a essence counter on Ahri.
If there are three or more essence counters on Ahri, remove all essence counters from her, the next instant or sorcery spells you cast and Ahri gains lifelink until end of turn.
{g}{g}{r}{r}: Exile target instant or sorcery spell from your graveyard, you may cast it until the end of your turn. You may only activate this ability if Ahri is attacking.