Game Mechanics Interesting Potions

In 1.20.2, a new potion shop was added in Bremminglar that sells some very unique potions. The potion of Obsidian Skin is a quest helmet substitute, then there is a healing potion that lowers you to one health for 3 seconds and then (at its intended level basically) fully heals you, and finally a potion that heals you over 0 seconds (meaning it is instant i think). I think more potion shops like this could be added and unlocked in interesting ways around the world, examples being:

Rymek Tavern (Unlocked by doing a side-mission in Rymek or something)
Zhight Island (Already has a cool potion, just add more)
Cinfras Inn (Unlocked by collecting the shopkeeper's soul from a rare Dullahan ghost miniboss)
Bantisu Healers (Unlocked by finding some secret at the temple)
Lutho Apothecary (Unlocked by beating A Hunter's Calling)

Some potions could be:

Potion of obsidian skin, 8 mins, gives fire resistance
Potion of oxygen restoration, restores your oxygen bar 3 times
Potion of feathered feet, removes fall damage for your next fall
Potion of Caffeine, allows you to sprint freely for 3 minutes, can only be used 1 minute after logging in and cannot be used in combat

 

Is that what it's actually called? If so they're not being subtle about the Terraria reference

 

for the potion of feathered skin, would its effect trigger the next time you would otherwise take fall damage?

 

It shields fall damage once and then doesn't do it again.

 

yes plz add this is very cool +1