Fluids of Inconceivable Peculiarity

'Greasy' Greg Gremble is an antisocial hermit who lives in a house at the edge of the forest to the northeast of town. He is always on the lookout for interesting liquids, and usually has a checklist of creatures he needs "milked" in case the party wants to earn some cash, brew interesting potions, or just help out their old pal Greg.

Fluids for Greg

Shambling Mound Sap -> potion of lightning resistance
Orange Grung Poison -> various poisons
Boogle Oil -> oil of slipperiness
Kruthik Saliva -> potions of darkvision
Manticore Blood -> ???
Mindwitness Saliva and Blood -> ???