magic spell vs magical spell

magic spell and magical spell both are nouns.

Word	Noun	Adjective	Verb	Adverb
magic spell	Yes	No	No	No
magical spell	Yes	No	No	No

As nouns, magic spell and magical spell are synonyms defined as:

magic spell and magical spell: a verbal formula believed to have magical force

Other synonyms of magic spell include charm, spell.

magic spell (noun)	magical spell (noun)
a verbal formula believed to have magical force	a verbal formula believed to have magical force