Like most Pokmon cards, the value of Mega Charizard X ex 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 (Phantasmal Flames)
Oh, wait, this is actually a Magic card
And something like weighing packs just separates the casual hobbyists from the big-league collectors
Ultima, Origin of Oblivion A blight for 5 color decks, Ultima here also is going to be an inclusion in many casual Eldrazi decks as a mana doubler who can deny mana or land abilities to your opponents
When the mana is available Deed also finds its way into control decks, giving Oath of Druids players a way out of almost any jam while often leaving their chosen creature intact, and in the old days serving as an unexpected Tutor target that could turn the game around out of nowhere