As long as your devotion to green and red is less than seven, Xenagos isn't a creature.
At the beginning of combat on your turn, another target creature you control gains haste and gets +X/+X until end of turn, where X is that creature's power.
Near Mint - $11.25
Lightly Played - $10.50
Moderately Played - $9.00
Heavily Played - $6.75
Damaged - $5.75
Near Mint Non-English - $11.25
Lightly Played Non-English - $10.50
Moderately Played Non-English - $9.00
Heavily Played Non-English - $6.75
Damaged Non-English - $5.75