The Power Stone

{t}: Add one mana of any color.

{3}, {t}: Put X +1/+1 counters on target creature, where X is the number of Infinity Stones you control. Activate only as a sorcery.

"Before creation itself, their were six singularities. Then the universe exploded into existence, and the remnants of these systems were forged into concentrated ingots: Infinity Stones."
- The Collector