How It Would Work…
Create A Multi Layer Barrier Wall To Defend Against Strong Attacks, Presumably The Attacks From Higher Levels Or Over Powered NPC’s Like The Council Captain, or Mini-Bosses/Normal-Bosses.
3 Layers Being The Max, While It Provides Better Protection It Will Cost More Magic Energy, A Setting Could Be Made To Change The Maximum Size Of The Barrier, And How Many Layers There Would Be.
Additionally, And Optionally There Could Also Be A Shape Option, To Make It Circular, Square, Or In The Shape Of A Literal Shield.
