Valgrimm Academy: Blood and Ice:

Beneath the northern lights, hidden from a world that has forgotten the old gods, stands Valgrimm Academy. Its towers are carved from stone older than memory. Its corridors hum with runes that breathe. Its students are the blood-born heirs of gods and giants, valkyries and witches, trained in arts that can shatter the world or hold it together.
Not everyone who walks through its gates was meant to survive it.
The Runborn Series follows Skadi Rae, a girl who spent her whole life being ordinary...