"用魔法变出" can be translated as "conjure up (with magic)" or "create (by magic)".
For example:
She can conjure up delicious meals with just a wave of her wand. （她能用魔法一挥魔杖就变出美味佳肴。）
The wizard created a beautiful garden by magic. （巫师用魔法变出了一个美丽的花园。）