The Elden Ring

The Elden Ring is all colors.
{t}: Add two mana in any combination of colors
to your mana pool.
At the beginning of your upkeep you gain 2 life,
and draw a card. Then if you control 7 other
Great Runes you win the game.

Foul tarnished,in search of the Elden Ring.
Emboldened by the flame of ambition. Someone must extinguish thy flame.
— Margit, the Fell