Do Magic Cards cause a discard of the Friendor Magic Friend that casts them?

By Tombstone Frank, in Hollow Bastion

I am new to the game, and I have couple questions:

I have Sora, Bambi and Aladin participating in a battle against a Large Body. Total attack value is 11, and I want to play/cast a Fire spell to help me defeat it.

Question 1- can Aladin cast spell, with the magic card AND his support value both adding to the damage dealt to the Large Body

and

Two - If i would rather have Donald, who is in my Friends area, cast the spell, how would that work? (i.e. can he do so without participating in the battle and thus not being discarded, must he participate in the battle, or can it/must it be done as a separate action - in which case would the damage from the spell carry over into the battle or not, that sort of thing.)

Thanks for the help.

No, they do not need to be discarded after they cast.

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