Power of the Fire Giant Dreadnought

You’ve manifested some of the power of a fire giant dreadnought, granting you the following benefits:

Ability Score Improvement. Increase your Strength or Constitution by 1, to a maximum of 20.

Resilience of the Dreadnought. You gain immunity to fire damage.

Dreadnoughts Tactics. You gain a +1 bonus to AC while wielding two shields.

Shields of the Dreadnought. When you finish a short or long rest, you can touch up to two shields. These shields become Fireshields until you use this feature again.
    You can use a Fireshield as a melee weapon, using your Strength modifier for its attack and damage rolls. On a hit, it deals 1d6 bludgeoning damage, plus an additional 1d6 fire damage. You deal an additional 1d6 bludgeoning damage for each size larger than Medium you are.

Might of the Giants. As a bonus action, you can become Large for 1 minute, if you are already Large you become Huge. Anything you are wearing changes sizes with you, as do any Fireshields you are wielding. While you are Large or larger, you have advantage on Strength checks and Strength saving throws.
    You can't use this feature if you lack the room to change your size. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Shield Charge. While wielding two Fireshields, you can use your action to move up to 30 feet in a straight line and you can move through the space of any creature that is at least one size smaller than you. The first time you enter a creature’s space during this move, you can make an attack with a Fireshield against that creature. If the attack hits, the target must also succeed on a Strength saving throw (DC 8 + your proficiency bonus + your Strength modifier) or be pushed ahead of you for the rest of this move. If a creature fails the save by 5 or more, it is also knocked prone and takes 1d6 bludgeoning damage plus your Strength modifier, you deal an extra 1d6 damage for each size larger than Medium you are, and if the creature was already prone you roll all of the damage dice twice.