Wellspring Mage

Prerequisites: You must have a class that casts spells with a spell repertoire.

Wellspring Mage Adjustments: You learn spells as normal for your class, but change your spontaneous spellcasting in the following ways.

You can cast fewer spells each day unless you gain more spells thanks to your wellspring. Reduce your number of spell slots of each spell level by 1. Reduce the number of cantrips you gain from your class by 1.

A wellspring of magic fills you with power that's not fully under your control. When you roll initiative for a non-trivial combat encounter, as well as in other high-stress situations of the GM's choice, magic wells up within you. Attempt a DC 6 flat check.

Critical Success You temporarily recover an expended spell slot of any level of your choice. The temporary spell slot lasts for 1 minute, and if you don't use it by then, you experience an immediate wellspring surge. Success As critical success, except you randomly determine the level of spell slot from among your top three spell levels (or all your levels of spell slots if you have fewer than three). The slot lasts 3 rounds instead of 1 minute. Failure You generate a wellspring surge, with a spell level chosen randomly among your top three levels of spell slots (or all your levels if you have fewer than three).

You can gain a temporary spell slot no more than twice per day. If you would gain a temporary spell slot for a level that has no expended spell slots, there's no effect.