Water:You can control any form of liquid containing water, you can also heal others using water. *Can control like sweat, tears, ice, blood, just water, basically anybody fluid, etc.*
Earth: You can control earth materials, for example, rocks, the ground in general, metal stuff like that. You can cover others in rocks to trap them. You can have the ground "swallow" said the opponent. *Takes a lot of energy to swallow the opponent, you may faint using the "swallow" technique.*
Fire: You can also control fire and also if you want, just make it appear. *Simplest one, just imagine you have half of Shoto's quirk but can also manipulate it*
Air:The final element you can control is Air. You can manipulate it. Or you can use it to direct air pressure towards someone. You're also able to jump higher than the average person and can also fly. You could also make an "Air tornado" which can kill if desired. *Again, the "Air tornado" takes a lot of stamina*
(A/N: Heyo!! I hope you guys like the quirk I picked out, if you guys want to change it please write it in the comments or DM me and I will get back to you as soon as I can! bye bye my loves~)