Your size is Medium (7-8 feet).

You have a Walking speed of 35 feet.

You have Advantage on any ability check you make to end the Grappled condition. You also count as one size larger when determining your carrying capacity.

You have a Crab Claw arm that deals 1d8 + Strength mod Piercing damage, however your claw hand may only be used to make unarmed strikes or hold anything the DM agrees would fit in the claw, and may be susceptible to damage using a Str check as a metric.

You have 2 Tentacle arms sprouting from your right shoulder, however they only count as 1 free hand.

You cannot wear armour and must have all clothes custom fitted/made. You also have disadvantage on all Charisma (persuasion) checks and advantage on all Charisma (intimidation) checks and must make a persuasion check with a -5 penalty for first impressions. 

You may choose a feature from the following, and may swap it on long rest:

Gold Dragon Scales: You have Resistance to Fire damage.

Abominable Yeti Fur: You have Resistance to Cold damage.

Tarrasque Muscles: You deal double damage to objects and structures.

Abolith Tentacles: Both of your tentacles now count as a free hand.

Giant Crab Claw: The Crab Claw arm now deals 1d12 + Str mod Piercing damage.

Warhorse Tendons: Your speed increases by 10 feet.

You learn 2 languages designated by your creator, and another one at level 5.