Juice

Each player has a measure of their character's stamina, which is used to fuel most of their active abilities. Spells, Gear, and actions may require the expenditure of this stamina. The total amount of Juice a character has is equal to their 2 x Level. This Value caps at level 20 at which point a character has 40 total juice to utilize.
Juice only recovers on a long rest, and is used in place of spell slots or limited use features from other games.