New Monster Features [Homebrew - D&D 5e]

MONSTER FEATURES - A few  tricks to add some dept to your combats...

                You can find quite a few Monster Features in the DMG that change the armor class, damage resistance, damage/turn,effective attack bonus of monsters and more. Those add a few new dynamics, surprising the PCs and making the combats more challenging and more fun.
                 Well, here you'll find quite a few new features crafted by me. The fluff can be easily changed to fit a scenario or monster you have in mind.
                  PS: Even if the feature doesn't affect a monster's challenge rating, adding many of those to the same monster might make it unbalanced..

There you go. I hope you'll enjoy

True Form - once the creature is reduced to 0 hit points, it reveals its "true form", The creature receives a +4 AC bonus, all its damages are doubled and it regains all its hit points.
Effect on Challenge Rating: Increase its effective AC by 2, multiply the effective damage per round by 1.5 and double its effective HP.

Reconstitution - Every 3 rounds, if the creature has more than 0 hit points, it regenerates all its hp. Or you reduce its hit points to 0 in the next 3 rounds, or it will be full hp and, most likely, keep fighting.
Effect on Challenge Rating: Multiply the monsters effective HP by 2.

Survivor's Rage - When the creature loses half its hit points, it has advantage on all its attack rolls.
Effect on Challenge Rating: Increase its effective attack bonus by 2.

Grandiosity - Until this creature is reduced to less than half its hit points, all creatures have disadvantage on attack rolls against it.
Effect on Challenge Rating: Increase its effective AC by 2.
PS: These features have been made with the same mathematical logic of the other features presented in the DMG. So as long as you follow the instructions and as long as you're familiar with the monster creation process in 5th edition, your original creatures are going to be balanced when you're using one of these new features.

If you guys enjoy this, I might bring way more!

Till next time.