Octagon, Techno-Agency

{1}{u}{w}{t}: Investigate.
Whenever you sacrifice a clue, create a 2/2 black
Agent token with 3 charge counters on it.
Remove a charge counter from an Agent you
control: add one mana of any color, and target
Agent deals 1 damage to any target. this mana
can only be used to cast artifact spells.
The eight facets, hidden in lightning and shadow.