Giant Head

When Giant head enters the battlefield destroy an artifact you control, Target opponent takes
damage equal to the converted mana cost of the destroyed artifact.
When Giant Head attacks, you may sacrifice an artifact Giant head gains +X/+0 where X is the
mana value of the destroyed artifact.
When Giant Head deals Combat Damage to an opponent, you may return an artifact with
converted mana value of 5 or less from your graveyard to the field.