"I am..somewhat familiar." Ignis replied, keeping his eyes on the thing and trying his best to mentally calculate how far and fast this thing was going to be able to move and reach.

He's experimented on spells with Noct when they were away from Prompto and Gladio. Those two were always busy wrestling and being themselves. However, when he could, Ignis got Noctis alone and worked on studying how the Prince's (at the time) magic worked.