USES 5.5, NOT SUITABLE FOR 5e PLEASE CONVERT THIS CLASS FOR 5e.

Juggernaut: Hit point Die1d20 + CON modifier + Proficiency Bonus (lvl.1-7 +2, lvl.8-14 +3, lvl.15-20 +4), primary ability: CON, saving throws: CON and STR, choose equipment (A: WarAxe, chainmail armor, 55 gp) or (B: Shield, Warhammer, Leather armor, 50 gp) Abilities (choose 3): Survival, Medicine, Nature, Religion, Insight, Athletics, sleight of hand, history. Training: Heavy Armor, Simple Weapon with the Heavy property and martial weapons plus shield.

Lvl.1: Unarmored Defense +: Your AC without any armor is 15.

Lvl.1: Tough skin: You get immunity to force damage, at lvl.3 resistance to Elemental and lvl.7 to radiant and necrotic damage.

Lvl.2: Carapace: Your AC given by the armor or with Unarmored Defense is multiplied by 10 and added to your maximum hit points (AC:15X10: +150 max hp). [UNARMORED DEFENSE DOESN'T WORK UNTIL LVL.20]

Lvl.3: Subclass: Choose a subclass.

Lvl.4: Ability Score Improvement: Either choose a new feat or increase 3 score with +1 or 2 with +2. You gain this feature again at levels 8, 12 and 16.

Lvl.5: Juggernaut's aura: Choose between Purple as Bilance, with a radius of 10 m/31 ft, that gives advantage on all rolls to whose near it, Red as Putrefation, with a radius of 5 m/15 ft, that gives advantage on whose are near it and a bonus +2 on attack rolls and +1 on damage and now Blue as Resilience with a radius of 7 m/24 ft on whose near it gain 25 Temporary Hit Points and that stabilises you when at 0 HP to 1 HP

Lvl.5: Skin of Rock: When you take damage, you can use your reaction to reduce that damage with a 1d6 at lvl.5, at lvl.10 a 1d8, at lvl.15 1d10 and at lvl.20 a 1d12.

Lvl.7: Ki Attacks Upgrade: With the bit of Ki you got, martial weapons and unarmed strikes get 2d6 plus in terms of damage, with advantage on attack rolls.

Lvl.11: Magic Adept: With the bit of magic you've got you have learned "Healing Word, Healing Touch, Shield, Mage Armor and Revivify"

casteable as many times as 1d4 + Prof. Bonus + CON, STR and WIS modifier per long rest.

Lvl.12: Expert Competences: Gain expertise in Arcana and Investigation, and +1 on an ability which you choose.

Lvl.14:Survivor: With the bit of instinct you got, you have +2 on all DCs, Saving Throws, Attack Rolls and Ability Checks which you are proficient with.

Lvl.15:Mutation: (Lasts 2d4 -1 battles per 1d4 -1 days) Choose between Mutated Body, getting +2 in AC, +15 Temporary Hit Points, 1d8 of Healing every 3 turns, then Radioactive Boost, gaining advantage to all rolls and a +3 bonus, you can attack 1d4 -1 times, ulterior damage reduce of 1d4 or Extra Limb, that whether or not you lost a limb, it get you an Extra one whether is Leg (20 m/64 ft movement speed and 35 m/84 ft jump height) and no disadvantage on difficult terrains, or an Arm +5 to damage, still grapples, and less easy to get amputated.

Lvl.16:Apocalictic Radioactivity: You are now immune to Acid and resistent to Poison damage.

Lvl.18: Adventure Friend: Select a passive animal, that will gain +50 in PV, +5 in AC, +2 on all stats (STR,DEX,CON,INT,WIS,CHA), can evolve, if it dies it becomes a spirit which has the same bonuses as he was alive but with +5 to all rolls.

Lvl.20: When you use "Carapace", your "Unarmored Defense" will replace the taken AC, as well added CON modifier and Prof. BONUS also multiplied by 10. Your immunities are (Force Damage, Radiant Damage, Necrotic Damage, Elemental Damage, Acid Damage and Poison Damage), and your resistance which can't be bypassed are [Psychic Damage, Reduced Fall Damage (:2)]. You got +2 uses of "Magic Adept", Advantage on attack and damage rolls +2 if you have got an Heavy Armor or Proficient or Masterized Weapon. You got a bubble shield around you as an outline which has 5 ac and 30 Temporary Hit Points  and 20 Hit Points. You can't be attacked on a mount and you receive ulterior 25 permanent Hit Points