Destroyer

This card enters the battlefield with X +1/+1
counters on it, where X is the amount of mana
spend to cast this spell.
{3} : Destroyer becomes a 0/0 colorless Machine
and becomes a creature in addition to its others
types.
As long as Destroyer is a creature, it gains +1/+1
for each other artifact and each other
enchantement you control and it's indestructible.