"Yeah? Then put it out before the tree goes up, too," Billie tells him right after catches the knife he tosses over. She does it with ease, infinitely less worried about it than Strange is. Anyway, while he's (hopefully) putting the burning target out, she stabs the knife into the wooden step next to her for a second — just long enough to peel her gloves off — and then takes it back up.

Imbuing a weapon with magic just isn't a skill that's ever come naturally to Billie. She's never done it before the scale, she's no enchanter or alchemist, so it does take a moment of focusing on the knife before she can get it to kick in. It slowly begins to light up, hot red lines growing and cracking over the surface of dark metal. While the blade itself isn't actually breaking apart or really turning into magma, it does inevitably look molten in its own right.