Bound Guardian

You bind your soul to an area of up to 10 square miles that you have designated.  While you are alive, you cannot leave this area.  If a Teleport or Gate spell attempts to remove you from the area, you must return within 48 hours or the spell will wear off.  If you die, the effect of the spell changes.

    While you are alive and within the area, Aberrations, Celestials, Fiends, and Undead cannot enter the area, and any that attack into the area of your spell make the attack at disadvantage, or the creatures within make their saving throws at advantage.  A creature within the area cannot be possessed or charmed by an Aberration, Celestial, Fiend, or Undead.  As an action, once per day, you may summon and then control a number of Beasts, Elementals (that are not genies), and Plants whose total Challenge Rating add up to 20.  If a creature travels from another plane into your area and you do not want them there, you may cast Banishment as a reaction and return them to the dimension they travelled from. 

    While you are alive but removed from the area, the area is left under a Protection from Evil and Good and Dispel Evil and Good spell.  If you had summoned creatures to help defend the area beforehand, those creatures will defend the area to the best of their abilities, and are unaffected by the spells.

    When you die, the area will attempt to bury your body in any way it can.  While your body is within the area, it gains the same benefits as when you were alive, but with a few improvements.  First, the total Challenge Rating of your summons increases to 30, and you may make two summons per day instead of one.  Secondly, you may cast any spells you know or have prepared anywhere in the area, using your normal spell slots.  Thirdly, you can alter the weather whenever you wish, following the limits of Control Weather.  Finally, you are fully aware of anything that occurs within the area, as long as they are either touching the ground, visible by other creatures, or are detectable via a Detect Magic, and you can alert any creatures within the area of the location of any other creature you wish.  This ability lasts until your corpse is removed from the area for 72 hours.  If your corpse has stayed within the area for 1,000 years, it is no longer needed to maintain the area.