"You may possibly be overestimating how much we know about - 'physics' is not a word that's translating very well for me.  We know much about how the forces of magic interact within themselves, because that is necessary for wizards to learn to cast spells at all.  The more mundane ontologically-simple energies, and how those combine beyond simply paired interactions to form the whole Prime Material - this is less known."

"I admit, I'm a little curious about what would happen if you poked the Magma with your little finger, or maybe your little toe just in case."

"You may possibly be overestimating how much we know about - 'physics' is not a word that's translating very well for me.  We know much about how the forces of magic interact within themselves, because that is necessary for wizards to learn to cast spells at all.  The more mundane ontologically-simple energies, and how those combine beyond simply paired interactions to form the whole Prime Material - this is less known."

The blazing lava doesn't burn Merrin's hair, but does repel it on contact like Earth, though it is visible to keen-enough senses that the Magma is also being destroyed by the hair's touch.

"I admit, I'm a little curious about what would happen if you poked the Magma with your little finger, or maybe your little toe just in case."

"You may possibly be overestimating how much we know about - 'physicallaws' is not a word that's translating very well for me.  We know much about how the forces of magic interact within themselves, because that is necessary for wizards to learn to cast spells at all.  The more mundane ontologically-simple energies, and how those combine beyond simply paired interactions to form the whole Prime Material - this is less known."

The blazing lava doesn't burn Merrin's hair, but does repel it on contact like Earth, though it is visible to keen-enough senses that the Magma is also being destroyed by the hair's touch.

"I admit, I'm a little curious about what would happen if you poked the Magma with your little finger, or maybe your little toe just in case."