Acid blob

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An acid blob, b, is a type of monster that appears in NetHack. The acid blob is an amoeboid that is the first acidic monster that most heroes will encounter, and also likely the first amorphous monster as well.

An acid blob has a passive attack that has a 12 chance of triggering when it is attacked in melee, dealing acid damage against attackers without acid resistance as well as abusing strength[1][2]—this can splash the attacker in acid even if the attack kills the blob, and is affected by cancellation.[3][4] Being splashed by the acid blod's passive acid can also subject the attacker's armor and weapons to corrosion: armor has a 130 chance of corroding regardless of the melee attack type, and certain armor and weapons have a 16 chance of corroding if used to strike the mold directly.[5][6][7][8] Acid blobs possess acid resistance, poison resistance and stoning resistance.

An acid blob corpse is acidic to eat, and eating an acid blob corpse or tin cures stoning on the first bite.[9][10] Acid blob corpses are always fit for sacrifice, and do not become tainted from aging similar to lichen and lizard corpses, though they will still rot away like other corpses.[11][12]

Generation

Acid blobs may generate as peaceful for neutral characters. Reading any scroll of create monster while confused will create at least 13 acid blobs.

Strategy

Acid blobs will act the same as any other monster when hostile, but are ultimately harmless - however, attacking them poses a threat to an inexperienced and/or low-level player, and their amorphous forms allow them to ooze under doors and block a player's path. For some early characters, it is best to dispatch hostile blobs from a distance with disposable projectiles like rocks, or non-iron projectiles such as elven daggers. Wands and spells can work, but are better saved for more direct threats. If you have enough HP to survive a few splashes of acid, then use a disposable/non-iron weapon, attack bare-handed, or simply kick them; the acid splash may still affect any corrosion-vulnerable armor.

Neutral heroes dealing with peaceful acid blobs blocking their path will want to let their pet handle the dirty work instead, and can use movement m to try and nudge the blob into an open room if all else fails. Angering a peaceful acid blob incurs the usual -1 penalty to alignment record, or a -5 penalty if you kill the blob without angering it (e.g. via force bolt for Wizards) - be sure to farlook an acid blob to determine if it is peaceful.

Past the early game, acid blobs are little more than a nuisance that can occasionally erode weapons and armor if a player is careless in dispatching them, and proper erode-proofing mitigates even that annoyance. However, acid blob corpses have some value throughout the game, both as long-lasting sacrifice fodder and a vegan means of curing stoning - acid blob tins can cure it without dealing acid damage, but may take too long to safely open unless blessed.

Later in the game, players may employ confused readings of scrolls of create monster to fill up a dungeon level with acid blobs and prevent especially dangerous hostile monsters from approaching; this is also occasionally employed to stop the Riders on the Astral Plane from reviving.

The following information pertains to an upcoming version (3.7.0). If this version is now released, please verify that the information below is still accurate, then update the page to incorporate it.

Peacecful monsters can be displaced as with pets, allowing neutral players to move past peaceful acid blobs in their way.

History

The acid blob first appears in Hack 1.21 and Hack for PDP-11, which are both based on Jay Fenlason's Hack, and is part of the initial bestiary for Hack 1.0. From this version to NetHack 2.3e, acid blobs use the a glyph.

From its first appearance to NetHack 3.0.10, acid blobs are poisonous to eat rather than acidic, and their acidic passive attacks decrease weapon enchantment, as corrosion is not introduced until NetHack 3.1.0.

Variants

dNetHack

In dNetHack, notdNetHack and notnotdNetHack, acid blobs are classified as primordials.

Fourteen acid blobs are placed on the level containing the branch entrance to the Chaos Temple Quest (or "chaos1") if it is generated in the dungeon.

Encyclopedia entry

See the encyclopedia entry for amoeboid.

References

  1. src/uhitm.c in NetHack 3.6.7, line 2776: case for acid passive against you
  2. src/uhitm.c in NetHack 3.6.7, line 2784: check for acid resistance versus hero
  3. src/uhitm.c in NetHack 3.6.7, line 2762: cases below this line affect the hero even if they kill the defender
  4. src/mhitm.c in NetHack 3.6.7, line 1608: check for acid resistance versus monsters
  5. src/uhitm.c in NetHack 3.6.7, line 2786: corrosion of hero's armor from acid splash
  6. src/uhitm.c in NetHack 3.6.7, line 3011: corrosion of hero's armor and/or weapons used in the attack
  7. src/mhitm.c in NetHack 3.6.7, line 1621: corrosion of monster's armor from acid splash
  8. src/mhitm.c in NetHack 3.6.7, line 1623: corrosion of monster's armor and/or weapons used in the attack
  9. src/eat.c in NetHack 3.6.7, line 738: acidic corpses cure stoning
  10. src/eat.c in NetHack 3.6.7, line 1368: Eating a tin calls cprefx, but not eatcorpse on line 1644, where stomach acid is handled.
  11. src/pray.c in NetHack 3.6.7, line 1370
  12. src/eat.c in NetHack 3.6.7, line 1616