It can be important how it's placed. I was doing the multiple Healers + Wizards + Minions attack and it got ruined because the Healers and Minions were blown straight into an extremely high level Air Defence. The Wizards got PWNED.
It's made to nerf air attacks, DragLoon is basically impossible to stop at Th7-8 but with this, attack angles are limited and can be focused on those areas. Also used to nerf the traditional LavaLoon which almost guarantess you a two star against a Th10.