Eelkin (5e Creature)
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Medium monstrosity, neutral evil
False Appearance. While the eelkin remains motionless, it is indistinguishable from a normal plant.
Bites. Melee Weapon Attack. +2 to hit, reach 10 ft., one target. Hit: 3 (1d6) piercing damage plus 3 (1d6) poison damage.
Antimagic Field. The eelkin emits an aura of antimagic, as in the antimagic field spell, in a 10-foot radius until the end of its next turn.
Arrow Catching. In response to being hit by a ranged weapon attack, the eelkin deflects the missile. The damage it takes from the attack is reduced by 1d10. If the damage is reduced to 0, the eelkin catches the missile if it's small enough to hold in one hand.
The eelkin is a member of the animal kingdom that looks like and lives the life of a plant. It has several snakelike appendages stretching from a central core. It roots itself in one spot and feeds off the nutrients found in the ground. It is known to plant itself on a rotten log or corpse and prevent other creatures from accessing the nutrients by attacking them with its snakelike appendages if they get too near. Each snakelike appendage has poison fangs and two rudimentary eyes.
A Primitive Creature. Some scholars believe that the eelkin is a primitive creature that diversified into multiple species and is the primitive parent species for the hydra, beholder, medusa, echidna, flumph, grell, kraken, lobra, naga, otyugh, and yuan-ti. Some even go so far as to say that dragons are eelkin descendants. In some cases the snake appendages developed into eyes. In other cases the appendages each developed varying independent levels of sentience. Sometimes one snakelike appendage dominated and the others atrophied away.
Treasure. The eelkin will sometimes collect salt, tasty food, shiny bits of metal, or pretty rocks to draw creatures to their doom. Once an eelkin kills a creature, it reroots itself on the corpse and extracts all the nutrients. Occasionally an eelkin will have collected something that is actually valuable, or the creature it killed will have been carrying something valuable.