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 - $3.50
Lightly Played - $3.50
Moderately Played - $2.75
Heavily Played - $2.25
Damaged - $1.75
Near Mint Non-English - $3.50
Lightly Played Non-English - $3.50
Moderately Played Non-English - $2.75
Heavily Played Non-English - $2.25
Damaged Non-English - $1.75