Twilight archon

The Protoss Twilight Archon is a new, heavy assault unit.

A Twilight Archon can be created from the merging of either two High Templar, two Dark Templar, or one of each type of warrior.

Both branches of the Protoss warrior tradition share the ability to merge their souls. Twilight Archons radiate incalculable power and can unleash devastating psionic storms against enemy forces both in the air and on the ground.

Strategic Properties
The true abilities of the Twilight Archon are still shrouded in mystery, though it is clear that they are more than capable of taking care of themselves and dishing out considerable damage to clumps of weaker ground units. They are described as "attacking with psionic storms" which is identical to the Archon description in the StarCraft I manual.

Abilities
Twilight Archons possess the Dark Archon's feedback ability. It has been rumored that the Twilight Archon also has the High Templar's Psionic Storm ability.