Warrior of the Dinosaurs

The martial arts styles of Monks take on many forms, from open palm strikes and quick flurries, to magical blasts of energy. However, one of the most ancient and true forms of martial arts are the bestial styles of the world; ancient techniques harnessed by great beasts such as the Anklyosaur or Triceratops, and many other styles all exist to emulate nature, and increase lethality via the wisdom of evolution. 

This subclass can only be taken by creatures with the Anklyier, Jeholrak, Limukin, Pluvenn, Children of Seth or Manyhorn race. Alternatively, any race which specifies it classifies as a Dinosaur may take this subclass.

Level 3: Primal Discipline

You learn the secrets of savagery harnessed by ancient beasts, allowing you to eat well and deliver powerful attacks with your fists. At 3rd level, your hit point maximum increases by 6 and increases by 2 again whenever you gain a level. In addition, your unarmed strikes count as natural weapon attacks. 

However, in order to maintain yourself, you need to devour more sustenance, to maintain your powerful frame. When you take any form rest, you gain a level of exhaustion after that rest, unless you eat quadruple the usual portion for your size during that time.

Level 3: Raptors Prowl

You learn the secrets of the great raptors of the wilds; the ability to multiattack! When you take the Attack action, or utilize your Flurry of Blows, you can instead use the multiattack action, allowing you to immediately make an amount of Natural Weapon attacks equal to your normal number of attacks instead of Unarmed Strikes. You can also now choose to do slashing or piercing damage with your unarmed attacks, instead of only bludgeoning damage. Finally, you can now ready bonus actions, as if you took the readied action. If you ready both an action and bonus action, you do not need to use a reaction for either to resolve their effects.

Level 6: Flight of the Pterosaur

You have extensively studied the techniques of the winged ancients and their hunting styles, adapting them to your own. Your vision improves, allowing you to see up to 5 miles unaided without a lens, and spot things as small as one inch across with frightening accuracy. Your may add your dexterity modifier to perception checks. As long as you are conscious, if your passive perception is higher than a creature's active stealth roll (automatically passing if they do not attempt to hide from you), you cannot have disadvantage on attacks made against them, and they cannot have advantage on attacks made against you.

Level 11: Carnosaurs Endurance

The power of the wilds is now interred in your body, allowing you to take on a form resembling the mighty Carnosaur. As a bonus action you may spend 6 Focus Points to take on the visage of a Dinosaur of your choice, though your humanlike posture does not change. While in this form, your current and maximum Hit Points are doubled, and you may spend a Focus Point at any time to expend a Hit Die, rolling it and healing for that amount. Once per visage form, if you start your turn bloodied, you may enrage your primal instinct; all healing you receive is doubled, and you deal one additional die of damage with natural weapon attacks. This form ends when you hit zero hit points or after one hour.

Level 17: Aspect of the Tyranosaur

You have become a master of the Dinosaur fighting style, equal parts tough, lethal, and cunning. As an aspect of the mighty Tyranosaur, natural weapon attacks, and unarmed strikes against you gain a penalty to hit, equal to half your monk level, rounded down. You are immune to fall damage, and to non-magical slashing, piercing and bludgeoning damage. Your speed cannot be impacted by difficult terrain, and mundane environmental effects, poisons, traps and effects have no effect on you. 

In addition, your ability to hide from prying eyes is mastered, allowing you to live in peace from poachers, tourists, and pesky curious adventurers in your natural environment. Images of you of any kind except by direct sight are dark and blurry, impossible to make out, even if something as simple as glass obscures your form. Creatures who see you this way can tell your general direction, as if you were Invisible to them.