Shard Slag

Huge ooze, unaligned

Armor Class 18 (natural armor)
Hit Points 126 (12d12 + 48)
Speed 30 ft., burrow 20 ft.

18 (+4) 6 (-2) 19 (+4) 1 (-5) 1 (-5) 1 (-5)

Damage Immunities poison
Damage Resistances bludgeoning, piercing, and slashing from non-magical attacks; acid, lightning, poison
Damage Vulnerabilities cold
Condition Immunities blind, charmed, deafened, frightened, prone
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 5
Challenge 8 (3,900 XP)


  • Amorphous. The ooze can move through a space as narrow as 1 inch wide without squeezing.
  • Molten Form. Any creature that begins its turn within 5 feet of a shard slag takes 3 (1d6) fire damage. A creature that strikes the shard slag with a natural weapon or unarmed strike takes 7 (2d6) fire damage. A creature that grapples a shard slag or is grappled by one takes 10 (3d6) points of fire damage each round the grapple persists. A creature that strikes a shard slag with a non-magical weapon must attempt a DC 15 Strength save; if it fails, it’s unable to pull the weapon away from the shard slag’s molten body quickly enough, and the weapon takes 7 (2d6) fire damage. Unattended objects in contact with a shard slag take 2d6 points of fire damage per round. It can burrow through solid stone. Vulnerability to Water. If a significant amount of water-such as the contents of a large bucket, the liquid created by a create water spell, or a blow from a water elemental-strikes a shard slag, the creature must make a DC 15 Constitution save. On a failed save, the shard slag’s speed is reduced by 10 feet and it cannot use Multiattack until the end of its next turn. A shard slag that is immersed in water automatically suffers these effects, and at the end of its turn must succeed at a DC 15 Cosntitution save each round (this DC increases by 1 each subsequent round) or be petrified, reverting to its molten metal form once the water is gone once it is no longer immersed.


  • Multiattack. The shard slag makes 1d4+2 slag blade attacks.
  • Slag Blade. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d8+4) slashing damage, plus 7 (2d6) fire damage. Unless the target is immune to fire damage, it cannot use reactions until the beginning of the shard slag’s next turn.


These mindless oozes tend to resemble a lump of tektite (impact-fused glass) and mostly remain somnolent among the crags of the crater wall, absorbing the heat and radiation given off by the crater’s strata. However, when approached their irregular surface suddenly transforms into a mass of razor-sharp blades as they attack to attempt to consume the interesting new food sources. Like the combusted of the region, a shard slag’s fires burn with the radiation of metallurgic amber and bypass ordinary fire resistance.

Section 15: Copyright Notice

Legendary Planet Adventure Path (5E) © 2020, Legendary Games; Authors: Matt Goodall, Jim Groves, Steven T. Helt, Tim Hitchcock, Jason Nelson, Richard Pett, Tom Phillips, Mike Shel, Neil Spicer, Mike D. Welham

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