Power of the Storm Giant Quintessent

You’ve manifested some of the power of a Storm Giant Quintessent, granting you the following benefits:

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

Lightning Immunity. You gain immunity to lightning damage.

Lightning Sword. As a bonus action, you can call forth a blade of lightning in your free hand. If you let go of this sword, it disappears until you manifest it again as a bonus action. This sword counts as a martial melee weapon with which you are proficient. It deals 2d6 lightning damage on a hit.
    If your size changes, the sword's size changes with you. The sword deals an additional 1d6 lightning damage for each size larger than Medium you are, and if you are Large or larger, it gains the reach property.

Might of the Giant's. As a bonus action, you can grow larger, along with anything you are wearing, for 1 minute. While transformed, you gain the following benefits:

• You become Large, if you are already Large you become Huge.
• Your walking speed increases by 5 feet for each size larger than Medium you are, while transformed.
• You gain a flying and swimming speed equal to your walking speed.
• You have advantage on Strength checks and Strength saving throws.
• You gain immunity to thunder damage.
• You gain the ability to breathe air and water.
• If you are Huge your reach increases by 5 feet.

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.

Wind Javelin. When you take the Attack action, in place of one of your attacks, you can coalesce wind into a javelin-like form and hurl it at one creature you can see within 120 feet of you. The javelin is considered a magic weapon and deals 1d6 + your Strength modifier piercing damage to the target, striking unerringly. The javelin disappears after it hits.