Sage of Sorrows

Endure (At the beginning of your postcombat main
phase, put an age counter on this permanent, then if
it has three or more age counters on it, add {c}.)
When Sage of Sorrows dies, you may cast target
instant or sorcery card with converted mana cost
less than or equal to the number of age counters
on Sage of Sorrows from your graveyard without
paying its mana cost.