Infinite Relativity

At the beginning of your upkeep, put a stair
counter on Infinite Relativity.
At the beginning of each opponent's upkeep,
that player puts cards from the top of their
library into their graveyard equal to the number
of stair counters on Infinite Relativity.
Whenever a creature card is put into an
opponent's graveyard from their library, you
gain 1 life.