Soul Stone

Indestructible
When a nontoken creature dies, you may pay {1}. If you do, exile it with soul counter on it.
You may cast creatures from exile with soul counters on it, and you may use mana of any color to cast them.
You may equipp this to any creature equipped with Infinity Gauntlet. Equipped creature has +2/+2 and "{2}: Choose a color. Target permanent gains protection from that color until end of turn." Equip cost is {2}