Way of Shifting Mass

Monks of the Way of Shifting Mass no longer see their physical forms as a solid state, but one that is malleable. Harnessing ki to change the very composition of their mortal shells, they are able to grow to the size of a giant or shrink to the size of a keyhole in an instant. The monasteries of this ancient tradition do not judge an aspirant on their character or physicality, but the strength of their will and spirit. Thus, a monk of Shifting Mass can come from all walks of life. Some seek to tower over others to instill fear with their mighty stature. While others use their newfound diminutive stature to gather evidence of corruption within their societies and bring about revolution. One thing, however, is for certain. Those who follow the Way of Shifting Mass are destined to be a driving force of change just as mercurial as their form.

Expand and Contract

3rd-level Way of the Shifting Mass feature

Your mastery of your ki allows you to manipulate the matter that composes your body by either reducing or enlarging your size. As a bonus action, you can spend 1 ki point to either shift to the form of Mouse or Ogre for their allotted amount of time or until you lose concentration. You may use your Wisdom instead of Constitution when making concentration saving throws. While in either form you gain the following benefits:

Form of the Mouse.  You become Tiny for 10 minutes or until you lose concentration. While this size, you gain a +5 bonus to Dexterity (Stealth) checks and can move through gaps up to 6 inches across without squeezing. If you lose concentration or the duration ends in a space smaller than your normal form can fit, you are shunted 10 feet to the nearest space that can or you take 2d10 force damage and repeat the process at the beginning of your next turn.

Form of the Ogre. If you’re smaller than Large, you become Large for 1 minute or until you lose concentration. At activation of this form, you gain 10 temporary hit points. In addition, your reach increases by 5 feet and, once a turn, your melee weapon attacks deal an extra martial arts die bludgeoning damage on hit.

You may choose to break concentration early at the beginning of your turn. 

Shifting Stature

6th-level Way of the Shifting Mass feature

Through the constant change of your composition, you gain more benefits by shifting your natural form.

Miniature Might. While you are tiny or smaller you have advantage on Dexterity Saving Throws and ranged attacks against you suffer disadvantage. 

Immense Stature. While you are Large or bigger you have advantage on Strength (Athletics) and can cast Thunderwave, without it's components, at level 3 once per short rest. Dexterity or Strength is the spellcasting ability for this spell. 

Mercurial Form

11th-level Way of Shifting Mass feature

Your ki can flow like water in a storm, allowing for new and more sudden ways to shift your form. 

Toppling Shift. When you activate Form of Ogre (and later, Form of Giant), you can spend 1 extra ki to send opponents within 5 feet from you flying backwards. They must succeed on a Strength saving throw or be knocked prone. Opponents must be the size of the form you shift to or smaller or they automatically pass the saving throw..

Sudden Shift. You can now activate Form of Mouse (and later, Form of Ant) as a reaction to getting hit with an attack. By spending 1 extra ki you gain +5 AC until the start of your next turn. If your new AC would have made the triggering attack miss, it does. You can then move up to 5 feet without provoking opportunity attacks. You can choose to stay in this form or return to your previous size at the beginning of your next turn. If you do not have a smaller form to shrink to you cannot use this ability.

 

Polymorphous Proportions

17th-level Way of Shifting Mass feature

The training of your body is complete allowing you to unleash its full potential. As a bonus action, you can spend 4 ki points to transform into either of the following forms. This transformation and its benefits last for 10 minutes or until your concentration ends. You may use your Wisdom instead of Constitution when making concentration saving throws.

Form of Ant. You become smaller than Tiny for the duration of this form or until you lose concentration. While this size, you gain a +10 bonus to Dexterity (Stealth) checks and a +5 bonus to AC, you can move through gaps up to 1 inch across without squeezing, and you can’t make weapon attacks.

Form of Giant. You become Huge, if you are smaller than Huge for the duration of this form or until you lose concentration. At activation you gain 30 temporary hit points. In addition, once per turn, a melee weapon attacks deal an extra 2 martial arts die in bludgeoning damage on hit, and your reach increases by 10 feet. 

You may choose to break concentration early at the beginning of your turn.