Path of Ancestry

If you have two commanders, the last ability adds one mana of any color in their combined color identities. When you spend that mana on a creature spell that shares a creature type with either of your commanders, you'll scry 1.

Your commander's creature types are checked immediately after you cast a creature spell spending mana from Path of Ancestry's last ability. They aren't set before the game begins, and they may not be the same types your commander had when you activated that ability.

If your commander is a card that has no colors in its color identity, Path of Ancestry's ability produces no mana. It doesn't produce colorless mana .