>>65797215>his spells don't carefully modulate the temperature output so the ice never gets to its boiling point
When you cast magic by birthright, you tend to see a lot of conveniences or limiters tacked onto spells that you didnt or couldn't consciously think of. Basically, your own power is keeping you from, say, gaining super strength without upping your bone density, or teleporting "100 miles" without accounting for your planet's movement or relative momentum. Your magic, as an extension of yourself, keeps you alive best it can. You have no idea what germs are inside of you, but your immune system works anyway. Similar concept.
This can lead to "auto-immune" style failures, often leading to spells underperforming or what seem to be miscasts. However, sometimes it's just your bloodline trying to preserve itself long enough to make baby sorcerors. More often than not, if a sorceror finds this out, he will wonder why no one else has found a way to remove their limits, promptly remove them from themselves, and accidentally use up all of the oxygen in the room casting a mega fireball, or be rocketed away when conjuring a demon and displacing all of the air at once, or even thinking about casting the spell Haste.