Clinger

• Clung. For every 2 clingers that are attached to a creature, their movement speed is reduced by 5 and their DEX score is reduced by 1. Additionally, each round the creature must make a DC10 Constitution saving throw or take damage equal to half the number of clingers that are attached. To remove a clinger, a creature must use its action to make a contested Strength check to remove up to two of them, throwing them up to 10 feet away, or kill them. The clinger's movement speed is reduced to 0 while clinging.
• Condition Immunities charmed, frightened, paralyzed, petrified, prone, restrained, stunned.
• Tiny. Ranged attacks have disadvantage on all attack rolls against this creature.
• Nimble. If a clinger is attached to another creature, and a third creature makes an attack against the clinger, there is a 25% chance that the attack lands on the clung creature instead (1-5 on a d20).

Cling. Melee Weapon Attack: +5 to hit, reach 10 ft., 1 target. Hit: 1 (1d4 - 2) piercing damage. The target is clung to. 

Release. As an action, a clinger can release its grip from a target. When this creature dies, it automatically releases its grip.

Cling. The clinger can make a Cling attack as an opportunity attack.