At 1st level, a warlock gains the Otherworldly Patron feature. The following options are available to a warlock, in addition to those offered in the Player's Handbook:

The Primeval

You have made a pact with the very essence of nature itself. Not a specific entity, but the network of plant, animal and fungal life that makes up the many natural worlds. Those bound to the Primeval may be hermits, wanderers, and others who find solace in the isolation of natures beauty. They value the peaceful quiet of the forests and plains they protect. But if the primeval forces of nature designates a creature as worthy of traveling through, these warlocks will protect them just as viciously as they would drive away that would harm the natural order. Some of these Primevals manifest in the form of Ancient Dryads, Treants, as well as Blight Trees or Myconid Sovereigns.

In other settings such as Ravnica, this patron could be an Oak from the Selesnya Conclave, were as Eberron's Oalian of the Eldeen Reaches may employ special agents to act as diplomats for the Wardens of the Wood.

The Primeval Features Warlock Level Feature 1st Expanded Spell List, Nature's Ward 6th Empowered Warden 9th Terraform 15th Awakened Sentinel

Expanded Spell List The Primeval lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you. Primeval Expanded Spells Spell Level Spells 1st entangle, sanctuary 2nd barkskin, spike growth 3rd plant growth, speak with plants 4th freedom of movement, giant insect 5th commune with nature, tree stride

Nature's Ward Starting at 1st level, your patron gives you the ability to command the environment around you, allowing you to harness it for your allies’ protection. When an allied creature within 15 feet of you is targeted with an attack or is forced to make a Dexterity saving throw, you can use your reaction to summon a mass of wood, stone, and thick foliage to momentarily protect them, granting them half cover from the attack or effect. Once the roll is resolved, the barrier instantly crumbles. You can make this reaction after the ally has been targeted but before a roll is made. Half Cover A target with half cover has a +2 bonus to AC and Dexterity saving throws.

Empowered Warden Starting at 6th level, you are rewarded by your patron for safely protecting your allies. Your Nature's Ward extends to creatures within 30 feet rather than 15 feet. In addition, When a creature succeeds on a saving throw or is missed by an attack roll when under your Nature's Ward feature, vines and plant matter sprout from your skin to protect you as well. You gain resistance to nonmagical bludgeoning, piercing and slashing damage until the start of your next turn.

Terraform At 10th level, your presence is parasitic to those unlike your patron, twisting the landscape to better suit your charge. The ground within 15 feet of you morphs to better suit a landscape of your choice, such as growing grass or crystal. It is considered difficult terrain for creatures other than allies and yourself, and you ignore all other difficult terrain.