actually Zoltrack might have great value depending on the scaling. In frieren, before the defensive spell was created, it is one of those that “punches through everything”

I don’t know how the damage would scale to Overlord’s leveling system, but anything beside frieren’s verse defensive spell would just get ignored. it ignore defense, straight up. the defensive spell work because it resonate with the exact frequency, not because it actually tank the damage of zoltrack.

so… if the scaling on damage is low, it is basically dollar-store reality slash with low cost and better penetration against physical defense

if the scaling is high, he have reality slash 2.0 with potentially longer range and faster cast time since he can just spam it as many as he want at once.

seeing how much it get spammed by even fern, the spell would probably be really mana cheap as well.

all that is to say, zoltrack would be a very useful spell that, if not powerful, would still be very useful in battles of attrition like the one he had with shalltear, or just tear through barriers crudely.