Infinity Stone

You can have up to 6 cards called Infinity Stone
in your deck.
{1},{t}: Pay 2 life for each infinity counter on
cards you control; put an infinity counter on an
artifact you control. Then exile Infinity Stone.
Before creation itself, there were six singularities.
Then the universe exploded into existence, and
the remnants of these systems were forged into
concentrated ingots... Infinity Stones.