Endless Ruins

Basic (A deck can have any number of cards named Endless Ruins)
At the beginning of your upkeep, you may
choose to draw X cards, and lose X life, where X is half the number of Ruins you control rounded down. If you don't, sacrifice Endless Ruins.
"To attempt to conquer the Ruins is to play chicken with Nature. And Nature has been playing a lot longer than you." - The Unnamed Wanderer