Kevin Lowe

Ninjutsu {3}{b} ({3}{b}, Return an unblocked
attacker you control to hand: Put this card
onto the battlefield from your hand tapped
and attacking.)
Whenever Kevin Lowe deals combat damage to a
player, exile the top card of each player's library.
Until end of turn, you may play one of those
cards. If you cast a spell this way, pay life equal to
its mana value rather than paying its mana cost.

Nashi, Moon Sage's Scion