Even though Allura said what she said to Alice, she wasn't entirely confident in fighting against both the Reaper and the Lord of Destruction.
The wounds that Alice inflicted on the Reaper had healed already and she was losing against the Lord of Destruction.
Shura had an aura around her that would destroy everything it touched. Naturally, the same aura coated her attack. As for the Reaper, Allura only knew that it blocked off space and fired off concentrated beams of energy.
The rest were all unknown to her.
However, Alice was injured and couldn't fight anymore. As her teacher, even if it's brief, Allura had a responsibility to keep the young sapling safe. That's her job as a teacher!
Stomping down, her aura exploded out as she rushed towards the Reaper.
Since Shura was annoying to kill, she should focus on killing the Reaper first!
