Gideon of the Gatwatch

+3: Summon a 1/1 White Knight Ally Creature Token with indestructible.
-1: Gideon of the gatewatch becomes a 6/6 white knight ally creature with haste and trample that's still a planeswalker until end of your next turn.
-6: You get an emblem with "Every turn, gain 1 life and put a +1/+1 counter on one target creature."