Luke Trigustus of Verdos

Whenever you sacrifice a creature, Surveil 2.
{b/g},Sacrifice a creature/discard a card: Regenerate.

{1}, {t}, Sacrifice another creature: Search your
library for up to two creature cards each with mana values equal to 1 plus the sacrificed creature's mana value or less, reveal those cards to an opponent.
That opponent chooses one. Put that card into your graveyard, and the other into play. Then shuffle.