Chaeska, Keeper of Tresserhorn

Whenever a creature you control dies you may
pay an amount of {b} equal to its converted mana cost. If you do, exile that creature card, then you may return another target creature card with converted mana cost equal to or less than the amount of {b} you payed from a graveyard onto the battlefield under your control.
Pay 2 life: Add {b} to your mana pool. You may only use this effect up to three
times each turn.