Beast Titan

Altering Spinal Fluid. The spinal fluid of the Titan Shifter possessing this Titan has transformative effects. Each Eldian that has consumed the Beast Titan's spinal fluid must make the saving throw when it uses its Titan Control ability or turn into a Pure Titan (height of Titan varies).

Curse of Ymir. The Titan Shifter possessing this Titan will die 13 years after gaining the Beast Titan.

Long-Limbed. The range of the Beast Titan's melee attacks increase by 10 feet (included in the attack).

Regeneration. As long as the Titan has 1 hit point, it regains 20 hit points at the start of its turn. The Titan Shifter within the Titan's body doesn't benefit from this trait, but regrows any lost body parts while inside the Titan.

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

Titan Steam. A Titan gives off a large amount of heat, and it produces steam around its wounds as it regenerates. The area around any open wounds the Titan has are lightly obscured by this steam, and upon death, the Titan's corpse is moderately obscured until the entire corpse evaporates.

Transformation. A Titan Shifter can use their action to transform into a Titan, in this case, the Beast Titan. The Titan keeps the Titan Shifter's Intelligence, Wisdom, and Charisma scores (the above scores are placeholders), as well as the Shifter's alignment. When the Titan dies, or when the Shifter takes an action to end the transformation, the Shifter is ejected from the Titan's body, which instantly drops to 0 hit points and begins evaporating, unless the Shifter rejoins their Titan body within the next minute.

Weak Point. The Titan's weak point is its nape. A creature can target the nape, which has an AC of 20 and 30 hit points. If the attack against the nape misses, it misses the Titan altogether. The nape does not benefit from the Titan's regeneration trait, and the Titan dies if the nape is destroyed. Any damage done to the nape is done to the Titan Shifter within the Titan's body. If the Titan Shifter dies, the Titan dies.

Multiattack. The Beast Titan makes two melee attacks. It can also use its Titan Control ability.

Bite. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 22 (4d6 + 6) piercing damage, and the target must make a DC 20 Dexterity saving throw or be grappled by the Titan (escape DC 20). The Titan can only grapple one creature in this way, and cannot make Bite attacks while grappling a creature. 

Slam. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 26 (4d8 + 6) bludgeoning damage.

Rock Throw. The Beast Titan grabs a handful of rocks or other small projectiles and launches them in a 100 foot cone. Each creature within the cone must make a DC 18 Dexterity saving throw, taking 42 (7d12) bludgeoning damage on a failed save, or half that damage on a success.

Titan Control. The Beast Titan lets out a roar, commanding other Titans to obey. Each Pure Titan within 2 miles of the Beast Titan must make a DC 18 Wisdom saving throw or be charmed by the Beast Titan for 24 hours. While charmed, the Pure Titans follow the Beast Titan's orders, and ignore their Diurnal trait. The Beast Titan can take a bonus action on its turn to issue the Pure Titans orders, which they will follow on their next turn until the Beast Titan commands them to do something else, or until the effect wears off.

Instinctive Hardening. The Beast Titan hardens a part of its body that is being attacked, increasing its or its nape's AC by 5 and becoming resistant to bludgeoning, piercing, and slashing damage until the start of its next turn.