The pack runs extremely poorly. Initially, it was a constant 1 fps but after disabling Mipmap it somehow got around ~20 fps but it's still really bad. Optifine and Magnesium give crash.

RX 6600, Ryzen 5 2600

Same issue here. Honestly disappointing that you haven't gotten a response from the devs. Even in their discord there's basically no support for Spellbound

Yep, it's a shame. I really wanted to try it.

10-30 frames is my normal play amount and I'm on an old computer. Tinker with your graphics settings and particles and it runs smoother.