Like most Magic: The Gathering cards, the value of Arno Dorian depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Assassin's Creed)
My favorites of these cards are Cecil, Dark Knight / Cecil, Redeemed Paladin, Tonberry, Dragon Sniper, Vampire of the Dire Moon, Ashnod, Flesh Mechanist, and Tinybones, the Pickpocket
This is a great way to make the enemy hurt themselves or make them scared enough of doing so that they will simply not attack
I play Sephiroth, Fabled SOLDIER and she's amazing there
However, it has a few extra details that make it interesting as a card you want to play and one you want to keep in your collection
Both are generating major buzz and should be considered solid long-term holds for any investor or collector