My brother, who plays the mage Ranthir in the In the Shadow of the Spire campaign, requested a D20-statting of the spell seen in this video from Guild Wars 2:

FLAME OF THE PHOENIX
Evocation [Fire]
Level: Drd 2, Sor/Wiz 2
Components: V, S, M/DF
Casting Time: 1 standard action
Range: Medium (100 feet + 10 feet/level)
Effect: Medium size phoenix of flame
Duration: 1 round (see text)
Saving Throw: Reflex half or negates (see text)
Spell Resistance: Yes

A bright flame in the shape of a winged phoenix appears before you. With a screeching caw you can command it to attack any creature within range. The flame phoenix will fly in a straight line to that target. If it passes through the space of any other creature in its flight, that creature must make a Reflex saving throw or suffer 1d4 points of fire damage per every two caster levels (maximum 5d4).

Once the flame phoenix reaches its target, it stops moving for the round. In a burst of flaming feathers, the flame phoenix deals 1d6/level points of fire damage to the target (Reflex save for half damage, maximum of 10d6). If the target creature moves, the flame phoenix will follow it up to the limit of the spell’s range.

At the end of your next turn, the flame phoenix flies back to you in a straight line. If it passes through the space of any other creature in its flight, that creature must make a Reflex saving throw or suffer 1d4 points of fire damage per every two caster levels (maximum 5d4).