Hybrid Serpent Transformation

Upon receiving the Gift of Transformation from an ancient Hydra you gain the following boons and flaws:

As an action, you may transform into a monstrous hybrid: half-beast, half-sentient. While in your hybrid form, the following rules apply:

• You can’t cast spells or concentrate on spells. Your ability to speak is reduced to short, basic, guttural responses.
• You become Large.
• Your stats remain the same as your humanoid stats.
• Any armour you are wearing merges into your Hybrid Form or immediately drops to the ground. The GM may decide if they feel the armour is too large to merge.
• While transformed and not wearing any armour or using a shield, your AC equals 10 + your Constitution modifier + your Dexterity modifier. •
• While transformed you can use weapons and equipment as normal, unless specified elsewhere.
•  You gain the following attacks:
  • Bite: Strength based, 1d4 + Strength piercing Damage
  • Claw: Strength based, 1d8 + Strength slashing damage
  • Constrict: When making an attack action you may substitute one attack to make an attempt to grapple a foe. Upon succeding you make 2d6 + Strength bludgeoning Damage. You can use your action in you next turns to deal another 2d6 + strength. 
  •  If you made the attack action, as a bonus action you may make an unarmed claw attack or bite attack, provided you have not already used your bonus action.

Your hybrid form lasts for a number of hours equal to your Constitution modifier (minimum of 1) and ends early if you are knocked unconscious or reduced to 0 hit points. You can end your Hybrid Form by using an action on your turn.

Transformation Flaw: Lust for the Hunt The savage nature of your curse sometimes causes you to lose control. These ferocious tendencies are a constant struggle between you as a humanoid and the beast within. When you are in your hybrid form, you must succeed at a DC 10 Wisdom saving throw at the beginning of each turn or lose control. If you are in the light of a full moon, you automatically fail this saving throw. If you fail this saving throw, you are subjected to the following until you succeed: • You must move toward the closest nonplayer creature you can see, smell or hear, prioritising helpless creatures. If you end your movement and no non-player creature is within 5 feet of you, then you must use your action to dash toward one. • If there is a non-player creature within 5 feet of you and you have not used your action, you must make a melee attack against it, prioritising helpless creatures. • If you made a melee attack against a creature, and that creature is still alive, then you must use your bonus action to make an unarmed claw or bite attack against the same creature. Additionally, if you are subjected to the light of a full moon you must succeed at a DC 20 Wisdom saving throw or automatically turn into your hybrid form and cannot transform back until dawn. If you succeed in this saving throw, you are immune to its effects for 24 hours.