So, while discussing something different with Lycanthromancer, I got this silly idea.
The basic idea is a Persisted Fell Animate Greater Consumptive Field with Corpsecrafter and Destruction Retribution. Anything that gets slain by your Field becomes a zombie under your control that will explode with negative energy.
Now, you need to supercharge your field.
Easiest way to do that is Chicken Infested and a spell component pouch.
Sample build is a simple Human Necropolitan Commoner 1/Cleric 19.
Domains are whatever you choose. Undeath and Planning are good fallbacks if nothing else comes to mind. Flaws we need Chicken Infested.
In no particular order, we need the following: Extend Spell, Persist Spell, Fell Animate, DMM(Persist), DMM (Fell Animate), Corpsecrafter, and Destruction Retribution. Thankfully, we have two bonus feats at level 1 and we still have a flaw and domains to choose (which can take care of Extend Spell and one other) Nimble Bones is a great pick for another feat.
Assuming you have the turning attempts to fuel it, this trick costs you a mere 5 gp plus holy symbol.
At the beginning of the day, pull out chickens to supercharge your Field to max. Normally, these are really bad to fill up your Animate Dead pool with, but in this case, it's exactly what you want. You will now have an army of undead chickens with the following stats (note: based off of Raven stats because they state useability for similar-sized birds):
Tiny Undead
1/2d12+5 (8 hp)
Initiative: +5
Speed 20ft (fly speed questionable, but RAW is 40ft, clumsy)
AC: 13 (+2 size, +1 Dex)
BAB/Grapple: +0/-12
Attack: Claws +0 (1d2-2) or slam +0 (1d3-2)
Space/Reach: 2-1/2 ft/0ft
Special Attacks: Destruction Retribution*
Special Qualities: Darkvision 60ft, Damage Reduction 5/slashing, Single Actions Only, Undead traits
Saves: Fort+0, Ref+1, Will +2
Abilities: Str: 7, Dex 13, Con: --, Int:--, Wis: 10, Cha: 1
Feats: Toughness
*Destruction Retribution is not truly a special attack for any rules regarding them. Deals 1d6 negative energy damage in a 10ft spread centered on the zombie chicken. Reflex DC15 half.
Not very intimidating, but you have a LOT of them. Their low AC and hit points don't matter, because you want them all to be killed, and killed quickly. Until they are killed, they make life difficult for enemies by just clogging up the battlefield (Medium and smaller creatures can't move through them) and occasionally hitting them for a point of damage (assuming no DR). But when they die, they do some damage and can heal you if you're in range.
However, the real gem is that at any time, you can produce any amount of hen-grenades you want as a free action. Just draw out a chicken, let the Field kill it, and drop the new zombie.When you've produced a large number of them, just tell them to attack and watch the dumb things bum rush their target until it dies.
This, of course, still isn't counting what you yourself can do. With a caster level of at least 28, you are still a Cleric that has only cast one 7th level spell today. Even worse is that you have a ton of temporary hp (that you can refresh any time you want) and a monster strength score. When you decide you want to hit something, it goes down and stays there.
For an entertaining variant, you can go with (Necropolitan) Illumian Dread Necromancer instead of Cleric. You eliminate the need for a high Wisdom as well as two feats. The chickens are even tougher (+2 hp and +4 Dex), though that really means they have better initiative scores more than anything important. What you do posess, however, is an ungodly control pool. You can start a fight with a crazy 604 chickens, assuming no other caster level boosts and a Charisma of merely 30 (you will have more as a Dread Necro) If you want to doom a town, just completely overfill your control limit and set hundreds of zombie chickens free, then walk away. Hilarity will ensue.
