Seems balanced with X increasing every 5
.
I just noticed that Firebolt says:
Deals 3 damage to the target for each 10 fire quantums in your possession.
and Icebolt says:
Deals 2 damage to the target for each 10 Water quanta in your possession. Ice Bolt might freeze the target.
but the wording is wrong, since they give a base damage of 3 and 2 even if you don't have 10 quanta.
And in Firebolt the plural of quantum is wrong!
Anyway, a wording like this:
Delay target creature for each 5 Time quanta in your possession.
would mean that 1 turn of delay is always granted (referring to the other 2 bolts).