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 {1} or one mana of a color that creature is.)
Near Mint - $1.700
Lightly Played - $1.300
Moderately Played - $1.200
Heavily Played - $1.000
Damaged - $900
Near Mint Spanish - $1.700
Lightly Played Spanish - $1.300
Moderately Played Spanish - $1.200
Heavily Played Spanish - $1.000
Damaged Spanish - $900