Mishra's Final Weapon

Flying, Trample, Double Strike
Whenever this creature enters the battlefield exile
all artifacts. After this creature deals combat
damage to an opponent you may return up to two
of the exiled cards back to the battlefield under
your control. If this creature would be destroyed
or sacrificed you destroy an artifact you control
instead.
"...in his final moments of need Mishra called upon Phyrexia for one final weapon, one where Urza would
have no choice... but BURN!!!"