Sigurd, Jarl of Ravensthorpe is a rare Legendary Creature — Human Warrior card from Assassin's Creed (ACR), collector number 66. Current market price: $0.42 (foil $0.39), TCGplayer market prices via Scryfall.
Vigilance, trample, lifelink Boast — {1}: Put a lore counter on target Saga you control or remove one from it. (Activate only if this creature attacked this turn and only once each turn.) Whenever you put a lore counter on a Saga you control, put a +1/+1 counter on up to one other target creature.