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Serpent Stone

Type
Infusion
Slots into
Weapon
Found in
Dropped by Lucian, the Thirsting Knight in The Hidden Keep
Fits gear
2
Levels
4

Serpent Stone is an Infusion Tarstone in Mortal Shell 2, and it slots into a weapon. Two weapons accept it. It levels to 4 at the Tarforge in Marrow Keep, once Franz has the Etching Needles. Dropped by Lucian, the Thirsting Knight in The Hidden Keep.

Effect

Spends 15 Resolve to poison your weapon — the cheapest infusion in the game, and permanent at level 4.

Upgrade levels

Level 1Consume 15 Resolve to infuse your Weapon with Poison
Level 2Infusion lasts for 4 strikes
Level 3Infusion lasts for 8 strikes
Level 4Infusion is permanent

Our take

Fifteen Resolve is half what most infusions ask, and at level 4 the infusion stops expiring altogether. That combination makes Poison the cheapest status in the game to simply leave running.

Goes in

Every weapon and sidearm whose compatibility list names this stone.

Elsewhere in the wiki