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 - $4.75
Lightly Played - $4.50
Moderately Played - $3.75
Heavily Played - $3.00
Damaged - $2.50
Near Mint Non-English - $4.75
Lightly Played Non-English - $4.50
Moderately Played Non-English - $3.75
Heavily Played Non-English - $3.00
Damaged Non-English - $2.50