Seige Creature

You've learned to use your great size to your advantage. If you are a large sized or larger creature, or are currently transformed into a large or larger sized creature, you gain the following benefits:

• Once per long rest, as an action you can let loose a bellowing roar audible up to 100 feet away, forcing all creatures within a 30 foot cone to take a Wisdom saving throw with a DC of 8 + your proficiency bonus + your Constitution modifier. A creature that can neither see nor hear you automatically passes this save. On a failed save a creature is frightened of you for 1 minute, and must use its reaction to drop anything held in its hands before using its movement to move away from you as far as possible, avoiding any obvious pitfalls in their path. Any frightened target may attempt this save again if they take any damage, ending the effect on success.
• Your gain an additional 5 feet of reach with weapons and unarmed strikes, and an additional 10 feet to your movement speed. You also have advantage on rolls made to shove, grapple and restrain creatures smaller than you, and to escape being grappledand restrained by them. You also impose disadvantage on creatures attempting to shove, grapple or restrain you if they are smaller than you.
• You deal your maximum amount of damage, doubled, to terrain and objects whenever you make an attack roll against them using a weapon or unarmed strike, or an ability that isn't a spell.

These benefits only apply when the base size of your current form is at least large. You lose these benefits if your normal size would be reduced below large, by enlarge/reduce for example, or the duration of any effects making you large wear off, such as polymorph.