Magecraft

Magecraft, thaumaturgy or sorcery (魔術 majutsu) is the artificial reenactment of a mystery. It is the usage of a carburant (prana) to send a command to execute a pre-determined program (spell). One who uses magecraft is usually called a magus (plural: magi) or a sorcerer on the major translation sites.

The limits of magecraft have changed with time, as science has evolved and miracles from before became technically possible through science - regardless of the required time or tools to achieve it.

Medea comes from the age of Gods when magecraft was much more powerful. What she can do is not really magic, but it probably looks like magic to the magi of the modern world.