I once saw a video of a guy explaining how to play a card game. The game was quite like MtG, with a few differences. The "lands" were attached to the creatures. You paid for a creature by attaching the required number of "lands" to it, and I think you didn't get the "lands" back until the creature died. Damage dealt removed a number of the top cards of the damaged player's deck equal to the damage dealt, and you won by decking out your opponent. I recall the cards having maybe a black or red border, and some of the cards looked vaguely like Hearthstone's bloated zombie. It might have been a TCG or a CCG, but I think it might have actually been an LCG.