Amulet of Unknown Whispers

Converge - Exile the top X cards of your library, where X is the number of colors used to cast this card. Then any player may cast those cards as if they were in their hand.
{t}: Add {c} to your mana pool.
{x}{c}{c}{t}: Put an X/X spirit creature token with haste on the batlefield. Exile it at the end of your turn.