Mochi, Ever consuming

At the beginning of each players endstep
that player must choose a permanent they
control that has a card type not exiled with
Mochi and exile it.
Mochi has all abilities of cards exiled with it.
{3}{t} put all cards exiled with Mochi into
their owners graveyards, you may copy each
of them and cast the copies using any color
of mana.