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These D&D 5E Free Basic Rules only contain a fraction of the races, subclasses, backgrounds, feats, items, monsters, spells, and other content available on Roll20. Check out the Player's Handbook to add dozens of more player options to the Charactermancer, the Dungeon Master's Guide to expand on the tools available for DMs, and the Monster Manual to add hundreds of more unique creatures (including token artwork) to fight!

Traits

Amorphous: The ooze can move through a space as narrow as 1 inch wide without squeezing.

Corrode Metal: Any nonmagical weapon made of metal that hits the ooze 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. Nonmagical ammunition made of metal that hits the ooze is destroyed after dealing damage.
The ooze can eat through 2-inch-thick, nonmagical metal in 1 round.

False Appearance: While the ooze remains motionless, it is indistinguishable from an oily pool or wet rock.

Actions

Pseudopod: Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage plus 7 (2d6) acid damage, and if the target is wearing nonmagical metal 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.