Medium Ooze, Neutral
Armor Class 13 (Mage Armor)
Hit Points 45 (6d8 + 18)
Speed 20 ft., climb 20 ft., fly 10 ft.
STR
12 (+1)
DEX
10 (+0)
CON
16 (+3)
INT
14 (+2)
WIS
10 (+0)
CHA
8 (-1)
Saving Throws INT +4
Skills Arcana +4, Stealth +3
Damage Immunities Force
Condition Immunities Blinded, Charmed, Deafened, Exhaustion, Frightened, Prone
Senses Blindsight 60 ft., Passive Perception 10
Languages -- The Arcane Slime understands all languages but does not speak unless telepathy is used.
Challenge 3 (700 XP)
Proficiency Bonus +2

Amorphous. The ooze can move through a space as narrow as 1 inch wide without squeezing.
Corrode Magic. Any magical weapon that hits the arcane slime corrodes. After dealing damage, the weapon takes a permanent and cumulative −1 penalty to damage rolls. If its penalty drops to −5, the weapon is destroyed. Magical ammunition made of metal that hits the ooze is destroyed after dealing damage.

A medium sized ooze can dissolve a small non-artifact magical item no more than 2 feet long in 1d4 rounds and up to 4ft long if it is large sized ooze. Each time the arcane ooze dissolves a magical item it regains 2d8 hitpoints for common, 3d8 uncommon, 4d8 rare, and 5d8 for a very rare item.

Magical Resilience. The arcane slime has resistance to damage and advantage on all saving throws verses magical effects and spells as well as resistance to damage from magical weapon attacks. 

Arcane Armor. The arcane slime is constantly protected by a mage armor spell unless it is in an area of anti-magic.

False Appearance. While the arcane slime remains motionless, it can alter its form to look like any small magical item it has dissolved, appearing in all ways as the item, even under detect magic. The slime uses this ruse to be picked up by unsuspecting adventurers and placed inside a bag with other magical items that it can dissolve and digest. 

 

Actions

Arcane Pseudopod. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning damage plus 7 (2d6) force damage, and if the target is wearing magical armor, its armor is partly corroded and takes a permanent and cumulative −1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10.

Arcane Goo. Ranged Spell Attack: +5 to hit, range 30ft., one target. Hit: 10 (2d6 + 3) force damage.

Description

Arcane Slimes or sometimes called blue oozes, are powerful intelligent slimes created by wizards to serve as minions and producers of rare magical components and energies. These highly intelligent and somewhat likable slimes are often seen in laboratories and wizard libraries assisting their masters with experiments and being feed unneeded magical items in the process.

Arcane slimes without a master wander the land in search of new magic items to dissolve and new arcane mysteries to unravel.   

Environment: UnderdarkUrban

Drakesylvan

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