The thing about specializing in esoteric magic, is that your skillset is largely unknown.

They took her wand and cast anti-animagus wards, but when weeks passed without rebellion they grew complacent.

Sloppy.

Lestrange arrived to play on a non-existent fear, and in his arrogance approached her alone.

Had anyone studied alchemy they would have known better, who let an alchemist access ink?

Her array activates and Rabastan is blasted across the room-his wand now hers.

She...aquires some hairstrands, and the floo flares.

"...Theo?!"

She's pulled into the fireplace just as the wards start wailing.