A witchcraft jam needs spells that sound like spells. This pack is free:

• Magic Spells SFX Lite: 30 spell sounds: the charge, the cast, the bolt, the hit, plus fire, ice, lightning, shadow, holy, poison, shields, teleports, portals and summons.
  https://willosuna.itch.io/magic-spells-sfx-lite

And if you need menu sounds too: Essential UI SFX, 150 interface sounds, free.
https://willosuna.itch.io/essential-ui-sfx

Mono WAV, plus OGG versions for web builds.

All of it is synthesized from code: no recordings, no third-party samples. Royalty free for commercial use, no credit required.

Sonidos gratis, sin IA, con uso comercial permitido y sin necesidad de dar crédito. ¡Mucha suerte en el jam!