Undyne the undying

Amphibious. The merfolk can breathe air and water.

Spear. Melee or Ranged Weapon Attack: +2 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 3 (1d6) piercing damage, or 4 (1d8) piercing damage if used with two hands to make a melee attack.

Magic Spears. Hit: 4 piercing damage Undyne summons 15 magical spears. each one counts as projectile roll to hit (d20) if it lands it's attack it deals 1d4 magic damage.

If someone informs undyne that anime isn't real then she gets disadvantage on all rolls until end of turn.