Deaf wizards not knowing how to say spells and making up their own signs for them and coming up with creative, powerful new spells in the process
Deaf wizards giving their friends name signs that are actually unique spells (when signed with a wave of a wand) that remind them of the friend, maybe a puff of a certain aroma or a special light show or a cascade of specific flowers
Deaf wizards mastering nonverbal spells WAY before their peers because they could never use the verbal ones
Lip-reading Deaf wizards always having the upper hand in duels
Hogwarts not having any interpreters and the staff feeling super awkward but the Deaf wizard being like FUCK IT and enchanting a quill to transcribe everything the professors say. Their peers look on in jealousy as all their hands start to cramp while they take notes.
Deaf wizards being expert mandrake-potters who don’t even have to wear earmuffs
DEAF WIZARDS