Armored Titan

Transformation. A Titan shifter can transform into a Titan, in this case, the Armored Titan. When the Titan shifter in human form has a purpose in his heart and damages himself, he or she shifts into a Titan. The Titan forms out of air and manifests in seconds. The shifter's Intelligence, Wisdom, and Charisma scores stay the same. Once the Titan shifter wants to revert back to humanoid form, he or she will pop out of the Titan's nape, and the body will slowly melt into steam.

Curse of Ymir. 13 years after they first gains their powers, the Titan shifter will die.

Siege Monster. The Armored Titan deals double damage to objects and structures.

Regeneration. The armored Titan recovers 20 hit points at the start of each of its turns, and 10 to the person inside the Titan. If the Armored Titan takes any form of damage to the nape of its neck, this trait doesn't function at the start of the Armored Titan's next turn. The Armored Titan only dies if the person inside dies.

Weak Point. The nape of the Armored Titan's neck is a weak point. An attack which specifically targets the Armored Titan's nape deals damage to the person inside (has 60 hp in the nape). If the person inside dies, the Armored Titan is destroyed. You must climb up the Armored Titan to the nape with a Melee attack, or you can try to shoot it with a ranged weapon at disadvantage.

Multiattack. The Armored Titan makes two punch attacks.

Punch. Melee Weapon Attack. +13 to hit, reach 20 ft, one target. Hit: 52 (8d10 +8) bludgeoning damage and the target must make a DC 20 Strength saving throw or be knocked prone. On a failed save, the target is also pushed up to 10 feet away from the armored titan.

Charge (Recharge 5-6). If the Armored Titan runs at least 50 feet in one direction at something, it can make a body slam attack. +16 to hit. Hit: 74 (12d10 +8) bludgeoning damage, and the target gets knocked prone.