Calvin Pickard

Ninjutsu {1}{u} ({1}{u}, Return an unblocked
attacker you control to hand: Put this card
onto the battlefield from your hand tapped
and attacking.)
Whenever Covert Technician deals combat
damage to a player, you may put an artifact card
with mana value less than or equal to that
damage from your hand onto the battlefield.
Covert Technician