From Destinypedia, the Destiny wiki
Species:
Taken
Faction:
The Drifter's Taken
Rank:
Major
Class:
Taken Wizard
Mission:
The Reckoning (Tier 2 & 3)
Abilities:
High Durability Rapid Flight Midair Levitation Solar Necromantic Gaze Void Absorption shield Summon Shadow Thralls
The Ad-Hoc Wizards are Taken Wizards seen in the Bridge encounter in Tier 2 & 3 in The Reckoning, where they attempt to stall the Guardians from crossing.