You have resistance to force damage.
Whenever you gain an aethari trait, you can also choose from the following:
Whenever you take force damage from a level 1 spell or higher, you gain a number of ward points equal to your training die that last until the start of your next turn.
When you take the Spellcast action with a level 1 spell or higher that deals damage, you can replace the spell's damage type with force damage.
You have immunity to force damage.
You have force damage threshold equal to your proficiency bonus.