Oath of Eorl is a rare Enchantment — Saga card from Tales of Middle-earth Commander (LTC), collector number 64. Current market price: $0.28, TCGplayer market prices via Scryfall.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Create two 1/1 white Human Soldier creature tokens. II — Create two 2/2 red Human Knight creature tokens with trample and haste. III — Put an indestructible counter on up to one target Human. You become the monarch.