Bestow Curse (R) - Now THAT is a real curse. The regular spell is a loser to me, but the rare one is rock solid.
I'll take credit for the cauldron-linked idea. I remember when converting the ZEITGEIST one-shot Bonds of Forced Faith to 5e that it was really frustrating how short the durations of the curses were. This was an adventure where the villains were a coven of witches, and part of the fun of the original 4e and PF versions was that the party got assailed with multiple obnoxious but not character-killing curses, and you only had so many remove curse usages, so people were going to go into the final combat with a variety of curses limiting their options.
The cauldron-link seemed like a good way to justify longer durations (and letting witches have more than one curse active, instead of having to concentrate on only one).
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I will say, I still think astral projection needed a fix.
In previous editions, when you went to a new plane from the Astral using this spell, it made you a totally new, totally fake body and all your gear, and you could walk around that plane being nigh-unkillable too. This was too strong and also caused issues with questions about item-duplication. But now the spell feels indistinct from gate.
Both let you travel between planes, but gate lets you
yoink a being if you know its true name.
I wanted to change astral projection back to the 'create a duplicate of yourself when you land in a new plane' for astral projection? And just add that any items that are away from your astral body for more than a minute cease to exist, and any charges expended are drained from the real items too.