Mighty Dreadnought

You are a living siege engine and no one will stand in Your way. 

• Increase your Strength score by 1, to a maximum of 20.
• You have advantage on ability checks and saving throws you make to prevent being moved against your will or knocked prone.
• You are unaffected by difficult terrain.
• When Your size increases You may add 1d6 to Your attack damage for each size increase affecting You. 
• As a bonus action You may break apart ground beneath You creating stones, or boulders depending on Your size that You may use for throwing as improvised weapons.