Sphereblade Guardion

{x}: Create a 1/X colorless construct with defender and "{t}: draw a card".
{3}, {t}: Destroy target untapped creature.
Artifact creatures have +3/+1. Acivate this ability only if this card is in your graveyard.
{w}: This creture gets lifelink, first strike or trample until end of turn.
{1}: This creature gets +1/-1 or -1/+1 until end of turn.