Rat King Potion is a piece of equipment in Dicey Dungeons that transforms the user into the Rat King. When upgraded, you can use it every turn. It is disabled if weakened.

This equipment is not affected by Fury or Re-Equip, so it carries over into the transformation.

Using this turns the user into the Rat King with his Reunion equipment, but the user will turn back after the turn or the fight ends.

The Rat King has this equipment:

• Poison Crown

When the player uses it, their Limit Break temporarily turns into Overload, which doubles status effects like Poison on both fighters.

Does not generate naturally.

The Alchemist has a 1/4 chance to have this potion in her equipment (1/3 if fighting the Jester). It will not appear if any of these potions are in her equipment:

• Wolf Puppy Potion
• Vacuum Potion
• Dire Wolf Potion
• Wisp Potion

However, due to these tight restrictions, the only way for Alchemist to have this potion in her loadout is to have these specific potions:

• Magician Potion OR Robobot Potion
• Baby Squid Potion
• Cactus Potion
• Snowman Potion

Even with all of these potions (a 1 in 18 chance), the probability of getting the Rat King Potion is 1/3, so the total probability is 1/54 (or 1/32 in the Jester episode since some potions are excluded).