I must be missing something about this spell. It basically seems to be spiritual weapon (but does 1d10 instead of 1d8) that allows you to "protect" someone (by spending an action to concentrate) that absorbs 10hp per hit, up to the guardian's 30hp limit, that also can create a flanking bonus.
So you can spend an action to concentrate, have it attack, spend an second action to concentrate to attack again (with a -5 for second attack penalty) and then spend your third action to have to "defend" an ally.
Ok, that all seems pretty decent, except this is a 5th level spell. Spiritual weapon is a 2nd level spell. I just don't see the two potential additional effects as being worth spiritual guardian being a 5th level spell when the damage is barely more then a 2nd level spell.
