Louis' space attribute itself doesn't have any offensive skills that directly harm the opponent.
However, his mastery over the attribute is profound enough to indirectly kill the opponents as he wishes. Of course, since his Arcana spirit was a pure wind attribute, he doesn't possess any soul skills of space either. What he can use is to use space attribute to his soul energy and create special techniques.
And Louis can create portals where he can deflect, reflect, and even teleport the incoming attacks, much less the opponents whenever he wishes. Although this has a limit in actual battle, right now, it turned out to be fearsome in the tournament.
Louis wasn't done with sending out the captain. Taking advantage of the shock Team Westside is experiencing, Louis conjured the same type of spatial wind arrows and shoot at the remaining four, one after another.