Circle of the Chimera

Druids are known throughout the world as protectors of nature and order, using their incredible magic and shapeshifting abilities to defend their territory, or bring swift wrath to those that would upset the balance of the world. Circle of the Chimera Druids are a breed apart from the rest, willing to upset the natural order in order to upkeep it, pushing the limits of their shape-changing abilities to terrifying heights. This circle of druids can alter their forms to include multiple beasts at once, taking on a combined, monstrous appearance, and using the strengths of each to supplement the other.

Chimeric Wild Shape

When you choose this circle at 2nd level, you gain the ability to add an additional beast form onto your current form with Wild Shape. As a bonus action, you can use a usage of Wild Shape to add an additional form onto your form, provided you are already shapeshifted into a beast through some means. You add the Hit Points of both beasts together into a single pool, and you can choose the best stats from each beast to use in your Chimeric form, including AC, movement speed, ability scores, checks, saving throws, and special senses. Unless both beasts include the same skill, feature or sense, you can also choose not to include it (like water breathing), and you can make any attack that either of the beasts could make, although your combined stats do not affect the attack rolls or damage of those attacks. 

Circle Forms

The rites of your circle grant you the ability to transform into more dangerous animal forms. Starting at 2nd level, you can use your Wild Shape to transform into a beast with a challenge rating of 1/2, or equal to your druid level divided by 4, rounded down (you ignore the Max. CR column of the Beast Shapes table, but must abide by the other limitations there).

Chimera Strike

Starting at 6th level, your attacks in beast form or Chimeric form count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage. Additionally, when you use your action to attack while in your Chimeric form, you can also make an attack from the other creature's attack list. You may not use multi-attack or extra attack as part of Chimera Strike.

Fluid Form

At 10th level, while you are already Wild Shaped, you can use a bonus action without expending a Wild Shape to assume a different beast form, or change one of the beast forms incorporated into your Chimeric form. You must follow the same restrictions and rules as if you had just Wild Shaped into that form, with one exception: your current Hit Points remain at their current value, or are reduced to the maximum value your new form could support, whichever is lower.

Greater Chimeric Form

At 14th level, you gain access to a stronger Chimera form. Whenever you use your Chimeric Wild Shape, you may include a third beast to your form as part of the same bonus action, and you can use the highest possible value for Hit Point values from the beasts you have selected instead of the average values (see their HP formulas), combining the Hit Points from all 3 beasts.

Bug Workaround

For some reason, the subclass creator requires a new class feature for druids at level 3, even though the class does not normally get anything at 3rd level from the selected subclass. If this issue is fixed in the future, I will remove this text.