Sejuani is a good unit to hold the Dragonmancer Emblem for Nunu early. We recommend to NOT level up and go for a lose streak. This will result in you being first pick in the carousel to get that spatula. DON't level up early!
At level 6 you can play 6 Dragonmancer which will give your main carry and Dragonmancer Hero Nunu a HUGE spike! Level up to 6 at stage 3-2.