| Mod | Save | ||
|---|---|---|---|
| STR | 15 | +2 | +2 |
| DEX | 14 | +2 | +2 |
| CON | 16 | +3 | +3 |
| Mod | Save | ||
|---|---|---|---|
| INT | 10 | +0 | +0 |
| WIS | 12 | +1 | +1 |
| CHA | 8 | −1 | −1 |
Traits
Amorphous: The Corrosion Crawler can move through a space as narrow as 1 inch wide without squeezing.
Corrode Metal: Any nonmagical metal weapon that hits the crawler takes a permanent −1 penalty to damage rolls. If this reduces the penalty to −5, the weapon is destroyed.
Nonmagical metal armor hit by the crawler’s attacks is partially corroded, taking a −1 penalty to AC (destroyed at −5).
False Appearance: While motionless, the crawler is indistinguishable from a puddle of liquid metal or rusted sludge.
Change Shape. The Corrosion Crawler can flatten into a puddle, cling to walls, or mimic metal surfaces. This grants advantage on Dexterity (Stealth) checks in industrial or dungeon environments.
Actions
Multiattack.
The Corrosion Crawler makes two attacks: one with its Claw and one with its Bite.
Claw. Melee Weapon Attack: +5 to hit, reach 10 ft., one target
Hit: 10 (2d6 + 3) bludgeoning damage + 5 (1d10) corrosion damage
→ Metal equipment is affected by Corrode Metal
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target
Hit: 13 (2d8 + 3) piercing damage + 5 (1d10) corrosion damage
→ If the target is wearing metal armor, it has disadvantage on its next attack roll
Corrosive Breath (Recharge 5–6).
The crawler exhales a spray of oxidizing sludge in a 15-foot cone.
Creatures in the area must make a DC 14 Dexterity saving throw, taking:
27 (6d8) Acid damage on a fail
Half as much on a success
Metal objects in the area automatically suffer corrosion effects.
Enter the description for how legendary actions work for your monster here.
Legendary Action Name (Costs # Actions). Enter the description for your legendary action.
Mythic Action Name. Enter the description for how mythic actions work for your monster here.
Mythic Action Name (Costs # Actions). Enter the description for your mythic action.
Description
Corrosion Crawlers are born in places where metal is left to decay—sunken ruins, abandoned forges, and flooded warfields. Over decades, strange alchemical reactions and latent magic cause oxidized metals to merge into a semi-living mass, they lie dormant as harmless-looking sludge, waiting for vibrations or the scent of iron. Once stirred, they lash out, consuming both flesh and steel, leaving nothing behind but rust-stained ground and ruined equipment.
Lair and Lair Actions
Enter a description of your monster's lair here.
Lair Actions
On initiative count # (losing initiative ties), the [monster name] takes a lair action to cause one of the following effects; the [monster name] can’t use the same effect two rounds in a row:
- Enter a description for a lair action.
- Enter a description for a lair action.
Regional Effects
The region containing a legendary [monster name]’s lair is [enter the effect description], which creates one or more of the following effects:
- Enter a regional effect description.
- Enter a regional effect description.
If the [monster name] dies, these effects fade over the course of #d# days.
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