Monk Subclass: Way of The Feral Soul

Monks spend their lives training their mind and soul to awaken the dormant power hidden in their bodies, but this subclass takes it the next level. Under a martial art designed on the magnificence of a Tiger, it manifests the power of your soul to the surface. This subclass is all about pushing your soul and body to the limit, and thus this reflects in the fact that you are fast and strong but you do not last long in combat.

Mark of the Beast At 3rd level, you again proficiency in Animal Handling checks relevant to feline creatures, along with darkvision of 60 ft. If you already have darkvison, then it's range extends to 120 ft. You have advantage on Wisdom (Perception) checks that rely on smell and hearing.

Cloak of Bastet Starting at 3rd level, once per long rest you can spend 2 ki points to activate a cloak of glowing energy that covers your body and loosely resembles a tiger. The number of times you can don the cloak safely increases at 5th level (2) 11th (3), and 17th (4). Under the cloak your walking speed increases by 5 ft, you count as one size longer, your unarmed strikes gain the reach feature, and spectral claws gather around your hands. When you make an attack you can choose whether to do either bludgeoning or slashing damage, and when you make a strength check you can use your wisdom score instead. The cloak lasts for a minute or until it is dismissed as a bonus action.

Improved Stride At 6th level, when under the cloak, you gain advantage in acrobatics checks, and your jump distance is tripled. When you don your cloak your movement doesn't trigger an attack of opportunity.

Shiny New Coat At 11th level, under the effects of the cloak, you gain advantage when making Dex saving throws. While it is active you can spend 3 ki points to alter the nature of your cloak. While under its effects you gain the benefits of the Investiture Of Flame spell, without having to use concentration. Additionally, you can spend 4 ki points to use the Cloak of Bastet after you have already spent all uses, however you must make a DC 15 con saving throw right after. On a success, you merely gain a level of exhaustion. On a failure, you also take 4d6 necrotic damage that can only be healed via long rest or Greater Restoration.

Beastly Projection At 17th level, under the Cloak of Bastet, your AC increases by 2. By spending 5 ki points you can have your Cloak jump off your body and form a spiritual glowing Tiger, at which point you lose all the benefits gained from the cloak. The Tiger has the same AC, speed, and proficiency in saving throws as you. It shares the same initiative and you can give it commands via bonus action. It can run on walls and water, and takes no damage from falls at any height. It can phase through any non magical barrier except 2 feet of stone, 4 inches of metal, or a thin sheet of lead. Any fiend, demon or devil that starts its turn within 5 feet of it automatically takes 5 radiant damage and 5 fire damage. Its hitpoints are half of your maximum hitpoints, and if either of you takes damage, it is split between both. The Tiger lasts a minute, and can be dispelled via bonus action or it's hitpoints reaching zero. If the Tiger loses all of it's hitpoints, then it disperses and you take 6d6 psychic damage.