You learn to Absorb and hold Clusters of magical energy in your body temporarily. You may store a number of Aether clusters equal to your choice of your Intelligence, Wisdom, or Charisma Modifier(min 1), these clusters can be restored completely upon completing a short or long rest. or 1 at a time by taking an action concentrating until your next turn to gather Aether in combat.
Additionally you may use these Clusters to use one of the following options.

• You may expend a cluster to reroll a spell’s Damage or healing die.
• You may expend a cluster to increase the Save DC of a spell you cast by 2.
• You may expend a cluster to increase the result of a spell attack roll by 1.
• You may expend a number of clusters equal to the spells level to regain a spell slot if the spell you cast failed or misses its target.