b'Black Patch \n'b'  Large   ooze ,  unaligned  \n'b'  Armor Class  7  Hit Points  153 (18d10 + 54)  Speed  0 ft., swim 40 ft.\n'b' STATS STR: 18 (+4) DEX:  5 (\xe2\x80\x933)  CON:  16 (+3)  INT:  4 (\xe2\x80\x933)  WIS:  6 (\xe2\x80\x932)  CHA:  1 (\xe2\x80\x935)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Skills   Stealth  +3  Damage Resistances  cold  Damage Immunities  acid, poison  Condition Immunities   blinded ,  charmed ,  deafened ,  exhaustion ,  frightened ,  poisoned ,  prone   Senses  blindsight 120 ft. (blind beyond this radius), passive  Perception  8  Languages  \xe2\x80\x94  Challenge  6 (2,300 XP)  Proficiency Bonus  +3 \n'b' SPECIAL TRAITS \n'b'\n'b'  Amphibious . The black patch can breathe air and water. \n'b'  Eldritch Luminance . When a creature that can see the black patch starts its turn within 90 feet of the ooze, the black patch can force it to make a DC 15  Wisdom  saving throw if the ooze isn\xe2\x80\x99t  incapacitated  and can see the creature. On a failure, the creature is mesmerized for 1 minute. A mesmerized creature that is more than 5 feet away from the black patch must move on its turn toward the ooze by the most direct route, trying to get within 5 feet. It doesn\xe2\x80\x99t avoid opportunity attacks, but before moving into damaging terrain, such as lava or a pit, and whenever it takes damage from a source other than the ooze, the target can repeat the saving throw. A mesmerized target can also repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature\xe2\x80\x99s saving throw is successful or the effect ends for it, the creature is immune to the black patch\xe2\x80\x99s Eldritch Luminance for the next 24 hours. \n'b'  Flowing Form . The black patch can enter a hostile creature\xe2\x80\x99s space and stop there. It can move through a space as narrow as 1 inch wide without squeezing. \n'b'  Ooze Nature . The black patch doesn\xe2\x80\x99t require  sleep . \n'b'\n'b' ACTIONS \n'b'\n'b'  Multiattack . The black patch makes two Pseudopod attacks. It can replace one  attack  with a use of Viscid Suffocation. \n'b'  Pseudopod .  Melee Weapon Attack : +7 to hit, reach 10 ft., one target.  Hit : 7 (1d6 + 4) bludgeoning damage plus 13 (3d8) acid damage. \n'b'  Viscid Suffocation . One creature in the black patch\xe2\x80\x99s space must make a DC 15  Dexterity  saving throw or take 18 (4d8) acid damage, and the black patch attaches to it, coating the creature and its equipment. While the black patch is attached to it, the creature\xe2\x80\x99s speed is halved, it can\xe2\x80\x99t breathe, and it takes 9 (2d8) acid damage at the start of each of its turns. In addition, if the creature is in the water, it has disadvantage on ability checks to swim or stay afloat. The black patch can devour flesh quickly, but its acid doesn\xe2\x80\x99t harm metal, wood, or other similar objects or creatures without flesh. The black patch can detach itself by spending 5 feet of its movement. A creature, including the target, can take its action to detach the black patch by succeeding on a DC 15  Strength  check. \n'b'\n'b' ABOUT \n'b' A large patch of an odd, black substance floats on the water. Its glossy sheen catches the light in a shimmer of color as the inky black substance drifts ever-so-slowly upon the tide. \n'b' Black patch is a bizarre swamp ooze that has left most who studied it\xe2\x80\x94from a safe distance\xe2\x80\x94baffled by its origins. \n'b'  Abstruse Lurker . At first glance, black patch resembles a grotesque specimen of pond scum. Casual inspection of its dark surface, however, reveals a psychedelic eldritch luminance within the tenebrous folds of its slimy mass\xe2\x80\x94a myriad of swirling colors that perpetually spiral in a maddening dance. \n'b'  Insatiable Hunger . A black patch stalks its prey slowly and silently from a distance. Since it can\xe2\x80\x99t leave the water, this semi-sentient aquatic ooze is forced to take advantage of its terrain to help it scavenge or hunt. Its digestive acid dissolves flesh and bone quickly but has no effect on other substances, such as wood and metal.'