Mindmeld

Crystallize {g}{g}{g}(When you successfully cast this
spell from your hand, exile it and create a Crystal
artifact token with "{g}{g}{g}, Sacrifice this permanent:
You may cast Mindmeld from exile for {0} until end
of turn.")
Target player draws a card then discards a card at random. If Mindmeld was cast from exile, target creature gets +X/+0 and Trample until end of
turn, where is is the discarded card's converted
mana cost.