Battle Snail

Retract to Shell. As an action, the battle snail can retract into its shell. As long as it is retracted into its shell, it gains a +4 bonus to AC, it is prone, its speed is 0 and can’t increase, it has disadvantage on Dexterity saving throws, it can’t take reactions, and the only action it can take is a bonus action to emerge from its shell.

Slime Slide. As a move action, the battle snail can move double its normal speed in the area covered by its slippery slime.

Trampling Charge. If the battle snail moves at least 20 feet straight toward a creature and then hits it with a bite attack on the same turn, that target must succeed on a DC 14 Strength saving throw or be knocked prone. If the target is prone, the battle snail can make one trample attack against it as a bonus action

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 11 (1d10 + 6) piercing damage.

Trample. Melee Weapon Attack: +8 to hit, reach 5 ft., one prone creature. Hit: 22 (3d10 +
6) bludgeoning damage.

Slippery Slime Spray (Recharge 5-6). The battle snail spits slippery slime in a 40 feet line. Each creature in that cone must make a DC 13 Dexterity saving throw. On a failed save, the target creature becomes prone.