Pif, Boom Boom Rocket Fist

When Pif enters the battlefield create X 1/1 Tinker Toys where X is the amount of mana spent to cast this card
Pif gains +X/Y where X equals half the total power of all artifact creatures you control and Y equals the total toughness of all artifact creatures you control
Sacrifice 4 Tinker Toys and exile target creature from target players graveyard that costs cmc 6 or less- Create a token copy of it except its a colorless artifact creature