
Defender
Metalcraft — As long as you control three or more artifacts, this creature gets +2/+2 and can attack as though it didn't have defender.
A mirror to draw its eye, a rod to rouse its rage, and a sword to break its bonds.
Illustrated by Johann Bodin
Released on February 4, 2011
Spire Serpent still has defender if you control three or more artifacts, although it will be able to attack.
If Spire Serpent has been declared as an attacker, and you stop controlling three or more artifacts later in combat, Spire Serpent continues being an attacking creature until combat ends.