Infinite Coven

The last thing your enemies (read: the world) will see.

Infinite Coven is a build created for Pathfinder spellcasters, intended to completely obliterate any target by boosting your caster level to obscene heights. It requires no feats, a single trait, and 1 fairly average priced item combined with 2 levels of Witch (for the 2 Hexes), and at least 9 more levels in a full-caster class (i.e. Wizard). It is game-breaking even at the most basic levels, and far more could be done with it to make it even worse. What follows is a simple, easily attainable version of the build that will still have your GM bashing you in the head with the rulebook.

THE BUILD

1. Take a level in Witch, select the Coven Hex, allowing witches within 30ft that share the Hex to use Aid Another to grant a +1 bonus to your caster level for 1 round. This applies to all your spells, not exclusively witch ones.
2. Take another level in Witch, select the Scar Hex. Use it on yourself. Now you can use the Coven Hex with a range of 1 mile.
3. Take Fools for Friends as a trait, gaining a +1 to any bonus granted through Aid Another.
4. Buy a Ring of Tactical Precision, netting you another +1 from Aid Another.
5. Finally, take enough levels in a spellcasting class to grab yourself Army Across Time. This spell summons clones of yourself (sharing all your items, feats, and traits) as a free action, only to use Aid Another to help you. For the purposes of this build, we'll take 9 levels in Wizard. The build is now complete.
6. (OPTIONAL) Take Magic Trick (Fireball) and select the Cluster Bomb trick to effectively remove the CL limit on the spell.

THE MATH

Now that your build is complete, all you need to do is cast Army Across Time when you're ready to roll. Since Army Across Time summons clones of yourself to use Aid Another for you, they'll all have the Coven feat and can add to your caster level. For every clone aiding you, you'll receive a +3 to your caster level for all spells. Here's where the trick comes in: Army Across Time lets you summon another clone AS A FREE ACTION every 3 caster levels, and you get +3 caster levels per clone. This means that you've now turned into a self-replicating ball of Wizard-colored goo. And since the Scar Hex buffs your Coven to the range of one mile, this means that your expanding ball of alternate selves can potentially encompass a 1 mile radius sphere.

Since every square is 5ft across, this means a radius of 1056 squares. Plugging this into the volume equation for a sphere nets us roughly 4,930,150,072 clones for a bonus of roughly +14,790,450,216 to your caster level. Now if you use a spell like Battering Blast (5d6 force damage, an additional blast every 5 levels) you're getting off 2,958,090,043 spheres for 14790450216‬d6 of damage at a range of roughly 7 million miles.

If you took the optional step of getting Magic Trick (fireball), you're going to be spitting out 7,395,225,108‬ 10ft-radius fireballs at 2d6 each, for a total of 14790450216d6 fire damage at a range of 112,048,865 miles.

Have fun obliterating the moon or swathing the entire planet in flames several times over!