Shattered Kingdoms

How come this is a held spell yet unlike armor, bless and other held spells it drops after a period of time? Can this spell be fixed so that it works like other held spells? Or make it so that one doesn't have to concentrate on it if it drops after a period of time.

Sanctuary works the exact same way. Magical vestments work the exact same way. I believe frenzy works the exact same way.

Many divine buff spells have the mechanic of 0 mana upkeep but involve concentration costs.

This is probably the ideal situation for a caster who wants to use mana to cast heal spells while still maintaining defensive buffs in a balanced fashion.

It works fine as is.