Syndicate Researcher

Ninjutsu {1}{w/b}{w/u} ({1}{w/b}{w/u}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever a Ninja you control leaves the battlefield, shuffle a target non land permanent
into the owner's library. That player then reveals
the top card of their library until they reveal a
card that shares a type and puts that card in their
hand. Put the remaining revealed cards on the
bottom of the owner's library in a random