Lim-Dûl's Paladin

Creature — Human Knight — {2}{B}{R}

Trample At the beginning of your upkeep, you may discard a card. If you don't, sacrifice this creature and draw a card. Whenever this creature becomes blocked, it gets +6/+3 until end of turn. Whenever this creature attacks and isn't blocked, it assigns no combat damage this turn and defending player loses 4 life.