Good luck trying to counter a mage that can instantly kill practically anyone/everyone in the world that gathers against them.
If they try to mount a resistance to overthrow you with a giant army, just solve that issue with Meteor Swarm. If the armies are too much, just Teleport or Plane Shift out of there and take a long rest. Then, teleport back to the enemies and meteor swarm them again. Rinse and repeat until every army that dares oppose you is destroyed by your magic guerilla-warfare tactics.
If they try to send adventures to slay you, do the dungeon plan that I detailed in
this post.
If they try to start an underground resistance, make public executions to discourage such actions. If you need to, infiltrate the organization with Alter Self. All you need to do to find the organization is to knock out a resistance member (sleep should work), use Modify Memory and Detect Thoughts to learn what they know about it and all of their codes/plans, and then thwart them from the inside. Even if they do manage to detect your alter self with Detect Magic, by the time that they discover you, it's too late for them to do anything and you can just destroy all of them with your magic.
OMG,
There are many mistakes here.
"Good luck trying to counter a mage that can instantly kill practically anyone/everyone in the world that gathers against them.
If they try to mount a resistance to overthrow you with a giant army, just solve that issue with Meteor Swarm. If the armies are too much, just Teleport or Plane Shift out of there and take a long rest. Then, teleport back to the enemies and meteor swarm them again. Rinse and repeat until every army that dares oppose you is destroyed by your magic guerilla-warfare tactics."
I couldn't disagree more.
You will have serious problems against flying creatures, as Meteor Swarm only hits the ground.
Any flying creature or flying mounts can end your "Instant kill"
Meteor Swarm does avg 140 damage or 70 avg damage.
This is certainly not Instant Kill. A level 11 and tough feat draconic sorcerer has 112hp and resistence to fire.
"If they try to send adventures to slay you, do the dungeon plan that I detailed in this post."
Creating a dungeon with creatures that you do not control and that you are trapping them, this Wizard does not survive more than 2 days there.
"If they try to start an underground resistance, make public executions to discourage such actions. If you need to, infiltrate the organization with Alter Self. All you need to do to find the organization is to knock out a resistance member (sleep should work), use Modify Memory and Detect Thoughts to learn what they know about it and all of their codes/plans, and then thwart them from the inside. Even if they do manage to detect your alter self with Detect Magic, by the time that they discover you, it's too late for them to do anything and you can just destroy all of them with your magic."
This one is the worst of all. You are not CHA based. You need to cast spells constantly with
verbal and somatic components. You do not survive more than a few hours to be discovered. You can't just be casting Modify Memory, Detect Through, Alterself without being the clear caster of these manipulation spells. You are not an Aberrant Soul Sorcerer, who is the only one capable of doing this with impunity, you need to cast your spells (Verbal, Somatic) for this to work,
this is where you die.
The infiltrating wizard is a joke.
Destroying the wizard is really easy. Extended Summon Celestial (The Avenger) for 600ft range damaging. It's a flying creature, so It's immune to Meteor Swarm. It can also destroy your dungeon, destroying everything in its path, traps, objects, barriers. Good luck. In 2 hours, the creature can deal 54,000 damage to its structures and you.
Divine Soul Sorcerer level 11 destroy the wizard.