Fremen Wayfarer

Fremen Wayfarer is all colors.
This ability doesn't affect its color identity.
(It can be in any deck whose commander's
color identity includes green.)
Multicolored spells you cast have convoke.
(Your creatures can help cast those spells.
Each creature you tap while casting a
multicolored spell pays for 1 or one mana
of a color that creature is.)