Circle of the Symbiote

Druids typically view themselves as caretakers of the natural world, using their magic to maintain the wild realms. Druids of the Circle of the Symbiote take this a step further. They become part of nature, allowing plants to take root in their flesh and become an integral part of their being.
Druids of this circle are sometimes seen as extremists by their brethren. They treat plants and animals as equals, seeing intelligent creatures as no more worthy of respect or protection than other living things. At their most extreme, these Druids wage war against civilization, calling on fang and vine to topple those who would invade the natural world and subvert it.
These Druids, owing to their close bonds to the natural world, are drawn to face the horrid invaders of the Cthulhu Mythos. They see themselves as the wild's first line of defence against these abominations.

Level 2 Features:

Circle Spells.

Your symbiotic nature grants you access to certain spells. At 2nd level, you learn the Guidance cantrip. At , 2nd, 3rd, 5th, 7th, and 9th level you gain access to the spells listed for that level in the Circle of the Symbiote Spells table.
Once you gain access to one of these spells, 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.

Primal Symbiote.

Vines and roots grow across your body, forming a symbiotic network. As it draws physical and magical nourishment from you, the symbiote grants you a number of benefits.
Fortifying Presence. You have Advantage on Constitution saving throws that you make to maintain Concentration.
Symbiotic Transformation. As a Bonus Action, you can expend one use of Wild Shape to allow your symbiote to transform you into a plant-like brute as fibrous plates and vines cover your skin. For 1 minute, you gain a +2 bonus to AC, you gain a number of Temporary Hit Points equal to 2 plus half your Druid level (round down) at the start of each of your turns, and you gain Advantage on Dexterity (Stealth) checks.

Level 6 Feature:

Symbiotic Reflexes.

Your plant symbiote empowers you. You always have the Haste spell prepared. Once per active Symbiotic Transformation, you can cast Haste on yourself without a spell slot or components.

Level 10 Feature:

Survival Instinct.

While you are in mortal peril, your symbiote can attempt to move you to safety. While you have the Incapacitated condition, you can take the Dash, Disengage, or Dodge action, and you retain the benefits of the Dodge action while you have the Incapacitated condition.

Level 14 Feature:

Surge of Sustenance.

As an action, you can expend one use of Wild Shape to grant the benefits of finishing a Short Rest to yourself or a creature you touch.
Once you use this feature, you can't use it again until you finish a Long Rest.