Rizomu, Fury incarnate

Guardian Companion - Your Commander cannot
have any color in common with this card and you
may cast spells from the collor of your Guardian
only if he is on the battlefield. (if this card is your
choosen Gardian Companion, you may pay {3} to
put it from outside the game into your hand).
Flying, Deathtouch.
You can't cast creature spells.