Chub Toad

Amphibious. The toad can breathe air and water.

Standing Leap. The toad's long jump is up to 60 feet and its high jump is up to 40 feet, with or without a running start.

Spiny Quills. When the toad takes damage, it fires quills at all nearby creatures. Creatures within 10 feet of the toad when this happens must succeed on a DC 12 Dexterity saving throw or take 1d6 piercing damage. 

Leeching Digestion. As long as a target has been swallowed by the toad, the toad regains 30 (3d20) hitpoints a turn and gets a +2 Strength modifier for any melee attack this turn.

Small Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 10 (3d6 + 2) piercing damage. +4 Dexterity modifier applied when used.

Heavy Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 14 (2d10 + 4) piercing damage, and the target is grappled (escape DC 13). Until this grapple ends, the target is restrained, and the toad can't heavy bite another target.

Swallow. The toad makes one bite attack against a Medium or smaller target it is grappling. If the attack hits, the target is swallowed, and the grapple ends. The swallowed target is blinded and restrained, it has total cover against attacks and other effects outside the toad, and it takes 10 (3d6) acid damage at the start of each of the toad's turns. The toad can have only one target swallowed at a time. If the toad dies, a swallowed creature is no longer restrained by it and can escape from the corpse using 5 feet of movement, exiting prone.

Quill Shot. Ranged Weapon Attack: +4 to hit, range 100 ft., three targets. Hit: 10 (1d20) piercing damage.

Chew. If the toad has swallowed a target, it may deal 3 (1d6) piercing damage to the swallowed target. Activate only as a bonus action.

Quill Augmentation. Until the end of the toad's next turn, it's quills become augmented, causing them to deal 12 (4d6) piercing. damage per hit. Activate only as a bonus action.

Stomp. If a creature is within 5 ft. of the toad, that creature must succeed a DC 8 Dexterity saving throw or take 10 (1d20) bludgeoning damage.

Ball of Destruction. When the toad reaches below 50 hitpoints, it curls into a Ball of Destruction, leaving only it's quills exposed. Each creature within a 50 ft. radius of the toad must make a DC 12 Dexterity saving throw or a DC 18 Strength or Constitution saving throw or take 20(2d40) bludgeoning and piercing damage.

The toad can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The toad regains spent legendary actions at the start of its turn.

Small Bite or Quill Shot. The toad makes one Small Bite attack or uses Quill Shot.

Quill Storm (Costs 2 Actions). Fires three quills at all creatures within a 100 ft. radius. All creatures in this radius must succeed three DC 8 dexterity saving throws or take 10 (1d20) piercing damage for every failed throw.

Acid Rain (Costs 3 Actions). The toad jumps 40 feet up into the air. Immediately following, each creature in a 100 ft. horizontal radius must succeed a DC 16 dexterity saving throw or be poisoned and take 10 (3d6) acid damage at the start of each of the toad's turns.