Poison Stones are upgrade materials in Dark Souls II.
- An altered state of titanite.
Used to imbue weapon with poison or to provide poison reduction to shields.
- Sorcerers at the Melfian academy once attempted to imbue titanite with various elements, but are said to have failed. Someone must have succeeded though; what else would explain this stone?
Given to Steady Hand McDuff along with souls to infuse a weapon with poison damage. Not all weapons can be infused with poison.