After all, there was no need to practice such things out here, when he only had need for tracking erasure and survivalist spells. He really didn't have the desire to get better with curses and whispering crucio under his breath at passing birds - just to feel the heat of his magic, that pleasure in his belly, of fire and power and taboo spellwork, to offset the balance of feeling out of control of his life - when he thought his idle companion was to dazed and unawares, just wasn't enough.