Super mutant blood sample

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

As the name indicates, it is a sample of super mutant blood used by the Brotherhood of Steel to research a super mutant megaweapon.

When dropped, it has the same world model as a blood pack, but is weightless and much larger.

Unmarked quest: Blood Brotherhood
After the completion of Who Dares Wins, if the Lone Wanderer did not destroy the Citadel, Paladin Tristan asks the player character to kill super mutants and bring back super mutant blood samples so the Brotherhood can research a weapon that could destroy super mutants with ease. These samples can be found on any super mutant killed by the player character, much like ears and fingers on corpses, and can be exchanged with Paladin Tristan in the Citadel's A ring for caps and XP.

Blutproben der Supermutanten Muestra de sangre de supermutante Образец крови супермутанта Зразок крові супермутанта