Manafluid

Manafluid is a fluid just like blood and water. It restores between 50 and 150 mana. Until the introduction of potions, the manafluid was the only item to regenerate mana instantly.

These days you can obtain it from different places as Daily Respawns:

• Potion Stands in Yalahar Magician Quarter (only when there's a full Floor Reset, which is rare)
• In multiple places around Glooth Factory, e.g. here. (Probably only after a full Floor Reset as well)
• Time Travel Dungeon (here)
• Near Marapur's Training School, here

You can move it into another fluid containers. It looks the same as Wine.

Manafluid spawns in a Potion Stand in the Magician Quarter.

Manafluid in a Potion Stand in the Time Travel Dungeon.

With update 8.10 the following changes occurred:

• Potions are introduced. Manafluid becomes obsolete.
• Magic Shopkeeper NPCs no longer sell vials of Manafluid. They used to for 55gp each.
• Note that they are still obtainable from daily respawns.

They used to spawn in a tavern at Nargor. This was removed in an unknown update.