Toad Mother (5e Creature)
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Medium fey (shapechanger), chaotic neutral
Saving Throws Str +5, Dex +3, Wis +4
Amphibious. The toad mother can breathe air and water.
Innate Spellcasting (1/Day). The toad mother can innately cast polymorph (spell save DC 13; only into the form of a frog), requiring no material components. Its innate spellcasting ability is Charisma.
Magic Resistance. The toad mother has advantage on saving throws against spells and other magical effects.
Shapechanger. The toad mother can use its action to polymorph into its true form, which resembles a Huge toad. Its statistics, other than its size and AC, are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.
Quarterstaff (Humanoid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) bludgeoning damage
Claw (Toad Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 20 (4d8 + 2) slashing damage, and the target must make a DC 15 Constitution saving throw, taking 27 (6d8) poison damage on a failed save, or half as much damage on a successful one.
Hex (Humanoid Form Only). Ranged Spell Attack: +5 to hit, range 30 ft., one target. Hit: 18 (4d8) force damage.
Sacrifice. When a creature the toad mother can see targets it with an attack, the toad mother chooses a frog or toad within 5 feet of it. The two creatures swap places, and the chosen frog or toad becomes the target instead.
The toad mother appears as a bloated, hideous human female. Toad mothers have great knowledge of the arcane and have a reputation as witches and healers. They are selfish and arrogant, but not always hostile. Some toad mothers live in swamps near human communities and sell potions and herbs. They have a natural affinity for toads and frogs. These toads roam the area around the toad mother's home in large numbers and will grow larger than common toads. Known to few, a toad mother can transform into a monstrous bloated toad herself.
From "Mother of Toads", Clark Ashton Smith, 1938