Twilight archon

The Twilight Templar is the ultimate expression of unity that once separated the Templars who chose the way of the Khala and those who did not. Much as the powerful Tassadar, Twilight Archons embody the combined might of factions once split asunder. .

Strategic Properties
The true abilities of the Twilight Archon is still shrouded in mystery, though it is clear that are more than capable of taking care of themselves and dishing out considerable damage to clumps of weaker units. Current it is unclear whether Dark Archons will have deadly abilities in addition to thier standard attack.

Reference
Starcraft 2 Unit Profiles