Path of the tiny

Tiny Rage (3rd level):
When you enter a rage, your size decreases by one category (Medium → Small, Small → Tiny). Your weapons shrink with you but deal normal damage, and you ignore the heavy property. While Small or Tiny and raging, you reduce melee weapon damage by 1d4 (increasing at higher levels), gain advantage on Dexterity saves, and lose 5–10 ft of speed depending on size, but you lose your bludgeoning, piercing, and slashing resistance.

Tiny but Strong (6th level):
Gain Strength save proficiency (or Athletics expertise if already proficient). You count as your normal size for grappling and shoving. When hit by a melee attack, you can use your reaction to make a melee weapon attack against the attacker (damage is halved), usable a number of times equal to your proficiency bonus per long rest.

Tiny Armor (10th level):
When you rage, you can choose to shrink without changing your actual size outside rage (never exceeding your normal size). While Small or Tiny and raging, you gain +2 AC and no longer lose movement speed.

Master of Smallness (14th level):
You can shrink outside of rage as a bonus action (not exceeding normal size). While Small or Tiny, you gain advantage on Stealth checks, don’t provoke opportunity attacks while Tiny, and can hide even with only light cover.

Level 3: Tiny rage

Starting at 3rd level When you enter a rage, your size decreases by one category, to a minimum of Tiny.
Medium creatures become Small.
Small creatures become Tiny.
Any weapon you are wielding shrinks with you and remains fully functional. Your weapon's damage does not change due to your size.
You ignore the heavy property of weapons while shrunk by this feature.
While raging and Small or Tiny, you gain the following benefits:
- You reduce damage from every melee weapon attack by 1d4 at lvl 3, 2d4 at lvl 6, 3d4 at lvl 10, 4d4 at lvl 14.
- You have advantage on Dexterity saving throws
- Your speed is reduced by 5 feet while Small and by 10 feet while Tiny.
But you lose the following: You no longer have resistance to bludgeoning, piercing and slashing damage while raging

Level 6: Tiny but Strong

Starting 6th-level
You gain proficiency in Strength saving throws. If you already have this proficiency, you instead gain proficiency in athletics checks (if you are proficient in athletics you get an expertise in athletics). For grappling and shoving, you count as your normal size category even while shrunk.
In addition, when a creature hits you with a melee attack, you can use your reaction to make one melee weapon attack against that creature. The damage of this attack is halved
You can use this feature a number of times equal to your Proficiency Bonus. you regain all uses when you finish a long rest.

Level 10: Tiny Armor

At 10th level
When you enter a rage, you may choose to shrink by one or two size categories, to a minimum of Tiny.
While raging and Small or Tiny, you gain a +2 bonus to AC.
You no longer lose movement speed when small or tiny

Level 14: Master of smallness

At 14th level
You can now alter your size without entering a rage. As a bonus action, you may shrink yourself to Small or Tiny, you cannot become larger than your normal size.
Your mastery of shrinking makes you incredibly difficult to notice.
While Small or Tiny:
- You have advantage on Dexterity (Stealth) checks.
- While Tiny, you do not provoke opportunity attacks.
- You can hide even when only lightly obscured by a creature, object, or terrain feature.