SS-Grade Sera

The heat that emanated from the training room was intense even though it was somewhat cold outside. Ever since the Black Fog and his faction appeared at White Mist's Dojo/Training Camp's doorstep, everyone proceeded to train non-stop, even cutting their sleep so they could add more time to their regimen. The beast masters White Mist and Jean Grey didn't feel like taking a break either, and they continued to train their Dual Beast Integration but to no avail.

Even with their constant improvement in their power output control, they could still barely hold the Dual Beast Integration for a minute or so. And even then, they could only keep their Dual Beast Integration if they don't move. The moment they take just one step forward, their Dual Beast Integration would deactivate, and they'd have to expend even more energy to reactivate it again.