Voldaren Bloodcaster // Bloodbat Summoner [Innistrad: Crimson Vow Prerelease Promos]

Defender
At the beginning of combat on your turn, you may clash with an opponent. If you win, Sentry Oak gets +2/+0 and loses defender until end of turn. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.) “Humans throw rice and release doves at their weddings? How quaint.”

FlyingAt the beginning of combat on your turn, up to one target Blood token you control becomes a 2/2 black Bat creature with flying and haste in addition to its other types. “Humans throw rice and release doves at their weddings? How quaint.”