pokemon sharpedo card ACE 9 - M EX - XY200a - Black Star Promo - [Colorless][Colorless] Pokemon X & Y Promo

You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn

That by itself makes Matzalantli, The Great Door an interesting card

While mana intensive, the ability to repeatedly refute an opponent's turn by bouncing their guy combined with the ability to use Disappear as a way to "protect" your creatures in combat (cast Disappear on it and then attack freely, knowing you can save it from lethal damage) made for a very potent enchantment that acted more as a sorcery than an enchantment

Players often buy booster packs in hopes of obtaining a card of high monetary or sentimental value, also often referred to as chase cards