Inf scaling abilities suggestions

[Darastrix]

Hello,
so if you have any ideas for spells that scale inf as the game goes on, i would like to hear em.
Ofc it has to be something more creative then kills 6 units gets 1 dmg...

 

[Flux]

Didn't think much but here's what I come up with:
- Every x seconds increase x damage
- Every x damage dealt, increase x damage
- Every x damage taken, increase x damage
- Every x gold gained, increase x damage