Tristan, the Inciter

Whenever Tristan, the Inciter attacks, Recruit X, where X is the amount of creatures that attacked this turn.
(To Recruit X, create X Recruit Tokens with "Sacrifice this token: Reveal the top card of
your library. If its converted mana cost is equal
to or smaller than the amount of Recruit Tokens
you own, you may put that card in your hand.")