"Sôwilô," William said instantly, recognition flaring as soon as he saw the rune. In Ravenclaw they used to write notes to each other all the time in proto-Germanic runes, and the older students were fond of substituting the older, disused runes to show off their knowledge and trip up their younger Housemates. "Not the commonly known form, it was almost never used past the mid-5th century. Now we draw..." He sketched a quick lightning bolt in the air, the tip of his wand leaving a faint blue glow in its wake.
"The sun rune," he expanded belatedly. Dallon would probably know more about it; as William recalled he'd received his NEWT in the subject. "What would it be binding?"