Relief Captain
Oath of the Gatewatch — uncommon
Creature — Kor Knight Ally
Relief Captain rulings:
2016-01-22: You can’t put more than one +1/+1 counter on any one target using the support action.
2016-01-22: Support can target a creature you don’t control.
2016-01-22: If a spell with support has other abilities that target creatures, those abilities and the support ability can target the same creature.