Usually only summonings, teleportation seals and of course barriers. Everything else is pretty simple and doesn't require it. [ There's also blood magic but that's pretty taboo even for Helios. ]

But it's generally not used very much, as I'm sure you can see why. Very unsettling to most and even to the one casting the spell it's sometimes detrimental to their health. At least here I have healing magic so it doesn't make the recovery time as long!