Mind Stone (WHO)

Artifact

{T}: Add {C}. {1}, {T}, Sacrifice this artifact: Draw a card.

Staple mana rock and draw engine for Commander. Mind Stone does double duty as early ramp and late-game card draw, making it one of the most flexible colorless artifacts in the format. The ability to sacrifice for a card ensures it never becomes a dead draw, and the low activation cost means you can cycle it away whenever you need to dig for answers. An auto-include in nearly every Commander deck that can afford the slot.

Doctor Who — Uncommon