For example I am a cleric of Mystra, and I would like her assist, so I solid Planar Ally:
You beseech an otherworldly entity for support. The being should be identified to you: a god, a primordial, a demon prince, or another being of cosmic energy. That entity sends a celestial, an elemental, or a fiend loyal to it to help you, making the creature seem in an unoccupied house inside vary. […]
When the creature seems, it’s beneath no compulsion to behave in any specific approach. You may ask the creature to carry out a service in trade for fee, but it surely is not obliged to take action. The requested activity may vary from easy (fly us throughout the chasm, or assist us struggle a battle) to complicated (spy on our enemies, or defend us throughout our foray into the dungeon). You should be capable to talk with the creature to cut price for its providers.
Cost can take a wide range of kinds. […]
My goddess sends a Deva with siverfire wings or one thing like that to assist me with a activity, and I ask the angel to only keep nonetheless and quiet for 1 hour. Then, I begin casting Planar Binding:
With this spell, you try to bind a celestial, an elemental, a fey, or a fiend to your service. The creature should be inside vary for all the casting of the spell. […] On the completion of the casting, the goal should make a Charisma saving throw. On a failed save, it’s certain to serve you for the length. If the creature was summoned or created by one other spell, that spell’s length is prolonged to match the length of this spell.
A certain creature should observe your directions to the perfect of its potential. […]
Would I be capable to management the angel in opposition to my goddess’ will with out paying the price of the planar ally? What occurs if I solid the binding at ninth degree, would I get a messenger of Mystra at my service for one yr, or solely till the angel completes its first activity?