Circle of Blight

When an environment is so out of whack with corruption or even civilization that the only way to help nature is to press the reset button; that's when you call in a blighter. Whether it’s to create opportunity for a new generation or to clear the old: The circle of blight specializes in the destruction of ecosystems.

EDIT: Do not use this sub-classe. At least not this version. Testing has revealed that at higher level this version of the sub-classe is inconsistant. Why? At higher level the buffer of Temporary Hit Points becomes very tin. As a result, the druid no longer ''manages'' his Undead Wild Shape. How long the Undead Wild Shape lasts becomes a matter of how much the DM focuses the druid in combat. This is not a fun player experience. 

Our group is working on a fix. Will post it if we do find one. Take this sub-classe as an exemple of what not to do.

Circle Spells

You gain access to circle spells. A circle spell counts as a druid spell, you always have it prepared, and it doesn’t count against the number of spells you can prepare each day. If you gain access to a spell that doesn’t appear on the druid spell list, the spell is nonetheless a druid spell for you.

DRUID LEVEL	SPELLS
3rd	Inflict Wounds, Dust Devil
5th	Vampiric Touch, Fireball
7th	Blight, Wall of Fire
9th	Insect Plague, Cloudkill

Undead Wild Shape

When you choose this circle at 2 level, you can choose to transform into undead creatures in addition to beasts. You can only transform into undead of the same CR as the beasts you can transform into.

In addition, if you would take damage that would bring you to 0 HP you can use a reaction to use your wild shape. The damage is first taken by your wild shape. If you use your wild shape in this way, you must take the shape of an undead. Using this feature uses two usage of wild shape. You can’t use this feature if you do not have enough usage of wild shape left.

Starting at level 6, your corporal undead wild shapes can talk. As such, a blighter of this level may talk, and cast spells, while in the form of a zombie but not while in the form of a Shadow or Specter.

Starting at level 18, you can talk while in all of your undead wild shapes.

Ecological Reset

Starting at level 2, when you cast a necromancy spell and a target is hit by your spell attack or fails it’s saving throw against your spell, you can spend a bonus action to deal necrotic damage to one of the target equal to your ecological reset damage.

Your ecological reset damage is equal to half your proficiency bonus. If you are in your undead wild shape, you add your wisdom modifier to your ecological reset damage.

Blight Sustenance

Starting at level 6, you no longer need to eat, drink or sleep as long as you kill an amount of beast, humanoid or plant that weight as much as you do per week.

In addition, when you kill a creature you are healed by an amount equal to your ecological reset damage. If you are in an undead wild shape, you also gain temporary health point equal to your ecological reset damage. You can only use this feature once per round.

Stand Among the Decimation

At 10 level, while you aren’t incapacitated any enemy within 30 feet of you have disadvantage on death saving throws.
If a creature within 30 feet of you fails a saving throw or is reduced to 0 health points, it counts as you killing the creature for the purpose of Blight Sustenance.

Plague Ignition

At 14level, using this feature you can cast Contagion except that it affects every creature except you within 30 feet. You must choose to afflict every target with the same disease. You can’t use this feature again until you finish a long rest.