Warrns are a highly intelligent species. They were once Hylins but adapted to underground climates. They use small blasts or energy that travel through tunnels. Warrns have no eyes because it’s dark underground and there other attacks are:

Bury-crushes people with dirt.
Ground wall-protects themselves.
Quake-creates rock creatures that kill anything in sight.
Rampage-throws rocks and destroys anything in its way.