Monks who practice the Way of the Snake have attuned themselves with the cold-blooded, legless, reptiles. They have learned some of the innate abilities that these beasts possess.

Thermal Sight

You can sense heat with your eyes. Within 60 feet you can see the silhouette of objects or creatures that have a different temperature than the environment they are in. This sight can penetrate non-magical darkness. You can tell if the object or creature is hotter or colder than the environment. This vision can penetrate non-magical barriers that are 2 feet or less in thickness. This can also be used to see invisible creatures, if their temperature is different than the environment. This can also be used to tell the general temperature of an object, creature or environment. For example you can see that a desert is hot or a tundra is cold. 

At 9th level you can identify creatures by their heat signature, if they have one. For this ability heat signatures operate similarly to fingerprints. Each organic creature, that is not cold blooded, has a unique heat signature. If you have encountered a creature with a heat signature before, you can identify that creature through its heat signature. This ability can be used to see through illusions or disguises which mask someone's identity. 

Thermal Sight

You can sense heat with your eyes. Within 60 feet you can see the silhouette of objects or creatures that have a different temperature than the environment they are in. This sight can penetrate non-magical darkness. You can tell if the object or creature is hotter or colder than the environment. This vision can penetrate non-magical barriers that are 2 feet or less in thickness. This can also be used to see invisible creatures, if their temperature is different than the environment. This can also be used to tell the general temperature of an object, creature or environment. For example you can see that a desert is hot or a tundra is cold. 

At 9th level you can identify creatures by their heat signature, if they have one. For this ability heat signatures operate similarly to fingerprints. Each organic creature, that is not cold blooded, has a unique heat signature. If you have encountered a creature with a heat signature before, you can identify that creature through its heat signature. This ability can be used to see through illusions or disguises which mask someone's identity. 

Slither Step

You gain proficiency in stealth. You can also use 1 Ki point to take the hide action as a bonus action. 

Constrictor

When you take the grapple action you can use 1 Ki point to use your Dexterity (acrobatics) modifier instead of Strength (athletics). Additionally any creature grappled by you in this way cannot take the attack, hide, dodge, ready search, or use object actions while grappled. The creature cannot use spells or abilities that require a somatic component while grappled. 

Viper Strike

When rolling for damage on a melee unarmed attack, use 1-4 Ki points to add 1d6 per Ki point spent in poison damage to a target. 

At 9th level this becomes 1d8 per Ki point

At 13th level this becomes 1d10 per Ki point spent and the target must make a constitution saving throw. On fail target becomes poisoned. 

Cobra's Charm

You gain proficiency in the persuasion skill. Additionally as a bonus action you can use 1 Ki point to attempt to cast charm person or command or you can spend 3 ki points to cast suggestion or 5 ki points to cast compulsion

Fist on Yellow, Kill a Fellow

If you score a unarmed melee critical strike on a non-legendary target that is poisoned, the target must make a constitution saving throw. On fail it is reduced to 0 Hit Points.