https://github.com/00-Evan/shattered-pixel-dungeon/blob/2bb34a4e91d29c8785a9363cad6ddfe5122b1d4f/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/items/potions/Potion.java#L515 With 3 different seeds, there is a 50% chance of a fully random potion. With 2 different seeds, there is a 25% chance of a fully random potion.

https://github.com/00-Evan/shattered-pixel-dungeon/blob/2bb34a4e91d29c8785a9363cad6ddfe5122b1d4f/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/items/potions/Potion.java#L538 The 1st healing potion is garunteed and the limit is 9, every brew decreasing the chance.

recall inscription is a fine name, why you being weird bro?

Most items have the same style of border. It's black at 40% opacity