Mystic Frog

Overview
The Mystic Frog is a Critter that spawns in the Jungle surface with a 2% (1/50) chance to spawn in place of a regular Frog. It appears as an orangepink frog with a large pink sunhat and glows a faint light in the dark.

When Purification Powder is used on it, it turns into the Mystic Slime, a Town NPC, similarly to how the Tortured Soul transforms into the Tax Collector.

Tips

 * It is best to try and unlock the Mystic Slime last if you're trying to get The Great Slime Mitosis.
 * The Guide To Critter Companionship will prevent the player from killing the frog accidentally.
 * Gnomes, Water Candles, Battle Potions and Coin Luck can be used to increase its spawn rate. Note that Water Candles and Battle Potions also will increase the spawn rate of enemies which can kill it.
 * Having a town of 3 or more NPCs nearby will greatly reduce enemy spawns while also increasing critter spawns.