Meruin wanted to point out that she wouldn't give Tyler over a minute, but she was rather busy chanting. She saw Mutt charging at her, but she didn't worry:

That was what the barriers were for, after all.

The rocks simply bounded of her reflective barrier, severely draining its strength. Meruin was just about relieved when the boulders stopped hitting, when Mutt came flying at her with about as much force. He was close enough to Meruin that she was actually a bit worried, and might have even stopped chanting to try and dodge his swing. Thankfully for her, one of the many runed papers on the floor activated.

A quick explanation for these papers; each of them have various effects, ranging from sapping out magic from a spell, or simple things like blowing up, or even controling the mind of a person. If you recall, Meruin had scattered these in papers, but in a specific order, made to make getting to her more difficult. The papers nearest to her had a single function . . .

The moment Mutt's swing was about to connect, the papers below him glowed bright, and he was teleported right on top of Tyler.