Ed's Durable guardian (revised)

You summon a powerful creature and beseech it's aid. your alignment shifts its form: good aligned summoners will summon a celestial, neutral aligned summoners will summon a Fey, and evil summoners will summon a demon or devil: it's appearance will depend entirely on the summoner, but it will always be a bipedal of medium or large size

The summon is friendly to you and your companions. The summon has its own turns that take place right after the summoner. It obeys any verbal commands that you issue to it (no action required by you). If you don't issue any commands to the summon, it defends itself from hostile creatures but otherwise takes no actions. If you issue a command for your summon to attack or cast a harmful spell you will not be able to attack or cast any spells on your turn: you may also cast spells with a range of touch through your summon: using your action and the reaction of the summon

When your summon drops to 0 hp it will vanish, you must cast the spell again to bring them back, you can also pull them into a pocket dimension as an action and pull them from it to a spot within 5ft of you as an action

At higher levels: when casting this spell at a higher level for every other spell level above 4th the summon will gain a +1 to AC, attack rolls, and damage rolls, For each spell slot you use to summon it above 4th you will add 30gp to the gold cost, if you already have a summon of 4th level or higher from this spell you will only need to pay 30gp for each spell slot above the slot used to summon it, for example if you summoned it using a 4th level spell slot and you want to summon it as a 6th level spell slot it would take 60gp to upgrade it