Death potion

The is a custom potion, giving you all the negative potions effects of the game except for Freezing.

Those effects will quickly kill you, unless you drink the potion in a room with a ceiling where you can't fly away with a Totem of Undying in your offhand. After you drink it, immediately drink a milk bucket to get rid of the negative effects.

Obtaining
The has a 0.0062% chance to be found in a barrel in the brewery cave of the Sanctum. Since there are 7 barrels in that room, the has a 0.0434% chance to appear in that room.It also has a (less than) 0.0062% chance to appear in the place of any potion in Structory: Towers, which includes the Wizard tower.

Description
Make your choice, adventurous stranger

Drink the brew, and bide the danger,

Or wonder till it drives you mad;

What would have happened if you had?