Fallaji 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 or one mana of a color that creature is.)
(09/09/2022)
The first ability of Fallaji Wayfarer functions in all zones. For example, you may find Fallaji Wayfarer while searching your library if an effect instructs you to search your library for a multicolored card.
(12/01/2024)
Tapping a multicolored creature using convoke will pay for or one mana of your choice of any of that creature's colors.
(12/01/2024)
Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.
(12/01/2024)
If a creature you control has a mana ability with in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.
(09/09/2022)
Fallaji Wayfarer's color identity is green. It may be included in any commander deck where the commander's color identity includes green.
(12/01/2024)
When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.
(12/01/2024)
Because convoke isn't an alternative cost, it can be used in conjunction with alternative costs.
(12/01/2024)
You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.
