Card
Arcane Signet
Artifact · MV 2.0
Oracle text
{T}: Add one mana of any color in your commander's color identity.
Rulings
2020-11-10 · If you don't have a commander, Arcane Signet's ability produces no mana.
2020-11-10 · If you have two commanders, the ability adds one mana of any color in their combined color identities.
2020-11-10 · If your commander is a card that has no colors in its color identity, Arcane Signet's ability produces no mana. It doesn't produce {C}.