Super mutant blood sample

The  is an item added to Fallout 3 in the Broken Steel add-on.

Surprisingly, it is a sample of Super Mutant blood used by the Brotherhood of Steel to keep track of how many Super Mutants a soldier has killed. The mutants will drop them if you have been given the related unmarked quest.

Unmarked quest: Mutant Blood Samples
The Super Mutant Blood Sample is an item added to Fallout 3 in the Broken Steel add-on. Surprisingly, it is a sample of Super Mutant blood used by the Brotherhood of Steel to keep track of how many Super Mutants a soldier has killed. The mutants will drop them if you have been given the related unmarked quest. All Super Mutant Blood Samples are to be turned in to Paladin Tristan. He can be found roaming the A- Ring of the Citadel.

Appearances
s appear only in Broken Steel, a Fallout 3  add-on.