Caroline

If Caroline and Justine are both in your hand or field, Turn them into Caroline & Justine, The Wardens
{u}{u}{u}{u}: Caroline can not attack or defend for 2 turns, Choose a creature in your hand, it becomes unplayable for 2 turns, but gains +3/+3 and either Trample or Lifelink (flip a coin to decide, heads is Trample)

"Kneel, Inmate!"