Tome of Ankhros

When this card enters the battlefield, search your library for up to 3 instants and/or sorceries and exile them.
{x}{t}: Play a copy of any spell exiled with this card. X is the card's converted mana cost
and can only be paid with mana at least one
of the colors of the spell. If the spell is
colorless, it can only be played with colorless mana.