The subtle artist chooses this time to abandon the screen in favor of attacking Celo.

Bella's good at blocks. She's not as good at blocking for someone else as she is at blocking herself - but she's still very, very good. She couldn't break the elf's screen and the elf can't break her wards.

The elf subtle artist whirls and comes at Bella with a knife. Bella quicksteps back, but she is not going to be able to outrun an elf, boots or no boots.