The caster transforms into the Wraith of Illiand, assuming specific traits of Lord Illiand Stormrage himself. The caster's size becomes "Large". He resembles a blurred image of Illiand, complete with wings. Two war-glaives appear in either hand. Any and all buffs/de-buffs currently affecting the caster are removed.

The caster gains True Sight for the duration of the transformation. The caster can Fly up to 60' per turn. Ground movement speed is doubled. AC is set to 25 (even if that is worse than current). The caster's health is temporarily set to their max (even if currently injured); however, the health is lost at end of spell. Caster gains +5 to all Strength, Dexterity, and Constitution Saving Throws. The caster may choose 1 of the following actions each turn:

Eye Beam: A beam of energy (range 120') emits from the eyes. It is +14 to hit and does 4d10+12 Radiant Damage.

Ravage: The caster strikes 2 times with each war-glaives (4 attacks total) to any target within 10 ft. (all on one target or spread among multiple targets within range). The war-glaive attacks are +14 to hit and do 2d10+12 damage per hit.

Whirling Glaives: The war-glaives can be thrown up to 120' along a designated path 10' wide. Any creature within the path may make a Dexterity Save  verses 20 to avoid the war-glaives. On failed save, the target(s) tale 2d10+12 Damage. If there is a primary target at the end of the designated path, a "to hit" roll is in effect (No Dexterity Saving Throw). The war-glaives then reappear in the caster's hands.

Time Stands Still: The caster can cast a minor version of the Time Stop Spell that last 6 seconds (1 turn).

When the transformation spell ends, the caster is fully exhausted, falls prone to the ground, and is unable to do anything (Incapacitated) for a full round. 

Additionally, during the transformation, the caster can only do the above actions. No normal character/class abilities can be used or cast.