Thousand Sons Seer

Brotherhood of Psykers (Exhaust to add {u} or {r} to your mana pool, it can only
be used for Instants or Sorceries.)
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
It is the role ofThousand Sons recruits to help their masters control the flow of warp energy