Ten times you can expend a token to add a +5 to a check, save, or attack roll (to a maximum of one token per roll). You can also expend a token to invoke a concept of space, time, life, death, creation, destruction, mind, reality, causality, plausibility, or fate. You can suggest the effect that happens to the DM, which then makes the final call of said effect. Invoking a concept takes an entire turn in combat (Action, Bonus Action, and Reaction, but not movement). Additionally, depending on the extent of the concept that you wish to invoke, the DM can choose a penalty to invoke upon you. You regain 1d4 Aetherium Tokens per long rest.

At Level 6, this becomes 15 times and a d6, at Level 14, this becomes 20 times and a d8

Space: moving an object or person(s) to a different location (like a spell), 'cutting' space

Time: stopping time, progressing time, rewinding time, overlapping past, present, and future

Life: bringing back someone from the dead or giving life to a previously non-living thing

Death: (it's just death)

Creation: you can create anything your mind desires

Destruction: It's inevitable.

Mind: manipulating memories, erasing them, making false ones, etc.

Reality: changing events that happened, adding events, removing them entirely, changing the make-up of the universe, changing gender, etc.

Causality: it's cause and effect, you can remove the cause, or remove the effect. You got hit by a sword. Normally, you would bleed, but there is not the effect of the sword hitting you, therefore you do not.

Plausibility: Make events break past what seems plausible. A small halfling with bony arms lifting a ******* tarrasque? No problem.

Fate: This one is the trickiest. You can negotiate with me privately to slightly alter what you believe to be the outcome of the event