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Acid is a bright-green liquid material that dissolves anything tagged [corrosive], which includes most materials with the notable exceptions of glass, dense rock, extremely dense rock, the wood of the great tree, lava and magical liquids. Like Lava, acid inflicts contact damage instead of staining the player. When released, acid flows downward, corroding materials in its path and releasing Flammable Gas as it evaporates.

Touching acid inflicts between 20 and 500 damage per second, depending on how much of the entity is in contact with the material, and aside from Ambrosia and Stainless Armour, nothing prevents or reduces acid damage. Without a massive health pool, acid threatens instant death at all points of a run.

Apart from its corrosion reaction, acid isn't an ingredient of any pre-set Alchemy recipe. It can be randomly selected as an ingredient of Alchemic Precursor or Lively Concoction.

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Avoiding Acid[]

Acid's extreme damage can end almost any run before the player can react, and once released, it will burrow through nearly anything. In any biome containing acid, the player should proactively take extreme caution to avoid it. Some suggestions include:

  • Carefully crack acid vats, detonate drums, and smash flasks from a safe distance
  • Desperately avoid losing the high ground to any enemy that spits or bleeds acid
  • Use redundant triggers, delays, and cast-delay-increasing measures to cast acid spells from screens away

Because acid represents a sudden-death threat, it's too dangerous for utility or offensive uses. Cast acid spells and use acid potions only in the most dire do-or-die situations.

Be particularly wary about acid reaching the bottom of a biome. If enough Holy Mountain Brickwork is corroded, the gods will summon Stevari, regardless if the player, a monster, or dumb luck is responsible. If acid is in play, quickly move from portal to Full Health Restore, in case a Stevari appears and knocks you back before you can heal.

Uses for Acid[]

Potions of acid, while dangerous, can be used as a digging tool or an improvised weapon.

As a digging tool, acid is powerful but tricky to use. A pixel of acid can excavate a winding hole slightly narrower than the player's body. When using acid to dig downward, spray just a few pixels at a time in horizontal and diagonal directions to avoid splash damage. Focus on widening and deepening existing passages until you can squeeze through. Acid may leave small chunks of terrain intact, blocking passage; these may be cleared by spraying acid at a surface above them. Using this technique it takes about 50% of a flask of acid to dig through the thinnest part of the Holy Mountain, above the shaft that enters the next level; doing this properly will not anger the gods.

As a weapon, acid is dangerous and unwieldy. As with Lava and other forms of environmental damage, kills with acid yield double gold, but it frequently eats through the ground before it can contact enemies. Larger quantities of acid, such as from Happonuljaska, may slow down or halt the corrosion process and cause pools to form. Standing pools of acid may abruptly resume corroding the environment, either at random or when revisiting a location.

See Also[]

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