Size Categories Higher Than Gargantuan (5e Variant Rule)

Design Note: These rules were designed to work with the Unusual Dice (5e Variant Rule) and Called Shots (5e Variant Rule).

The creatures created through this process are likely to have thousands of HP. Creatures that are Ginormous and larger will be able to withstand meteor impacts and something as tiny as a sword is unlikely to be able to kill them. Due to their size, Polymorph and True Polymorph would be inadequate for altering their composition, as the spells were presumably first created by beings hundreds of times smaller and not designed to change bodies the size of planets.

This means that played straight, combat with anything bigger than Enormous will probably be a slog. So it is recommended that when making characters extremely large, the DM gives them a built in weakness. Talos the metal giant was brought down by a spot on his ankle, the giants from Attack On Titan are weak at the back of the neck, etc. The weakness does not need to be physical though. Consider having a specific location or series of artifacts that are needed to weaken the creature or put it back to sleep. Due to the CR 30+ requirements of some of these creatures, players made need to unite nations, rally armadas, awaken titans, and join forces with dragons and gods just to have the manpower to threaten these beings. Remember, these are creatures that can tussle with The Tarrasque and stomp on mountain ranges. Defeating just one of them could take an entire campaign.

Size Categories Higher Than Gargantuan

Size	Space
Colossal	40 by 40 ft.
Titanic	120 by 120 ft.
Immense	480 by 480 ft.
Enormous	2400 by 2400 ft.
Stupendous	14,400 by 14,400 ft.
Tremendous	284 square miles (bigger than a city)
Humongous	13,953 square miles (size of small US state)
Ginormous	A mid-sized nation
Brobdingnagian	Larger than the earth
Vast	The size of a star
Astronomical	The size of a solar system
Immeasurable	The size of a plane of existence.

Hit Dice

Size	Hit Die	Average HP per die
Colossal	d24	12 1/2
Titanic	d30	15 1/2
Immense	d38	16 1/2
Enormous	d48	24 1/2
Stupendous	d60	30 1/2
Tremendous	d100	50 1/2
Humongous	d120	60 1/2
Ginormous	d144	72 1/2
Brobdingnagian	2d100	101 1/2
Vast	3d120	194 1/2
Astronomical	4d144	304 1/2
Immeasurable	d1000	500 1/2

Number of Targets Per Strike

Size	Number of Targets	Reach
Colossal	2	20 ft
Titanic	4	60 ft
Immense	6	120 ft
Enormous	8	600 ft
Stupendous	All within reach + City strike (15%)	1500 ft
Tremendous	All within reach + City strike (30%)	100 miles
Humongous	All within reach + Valley Strike (20%)	1,000 miles
Ginormous	All within reach + Valley Strike (40%)	10,000 miles
Brobdingnagian	All within reach + Planet-Strike (25%)	1,000,000 miles
Vast	All within reach + Planet-Strike (50%)	10,000,000 miles
Astronomical	All within reach + Reality strike (30%)	1 light year
Immeasurable	All within reach + Reality strike (60%)	10 light years

Special Attacks

Name	Affect
City Strike	When this character makes an attack it can target a City. If it does, it has a Percentage Chance to deal 110 (20d10) bludgeoning damage to all characters within the city, from buildings collapsing on them. If it rolls above its chance, it instead merely destroys 1d6+1 blocks of the city and causes all characters in that area to suffer half as much damage.
Valley Strike	When this character makes an attack, it can target a province, nation, or other division of land. If it does, it has a Percentage Chance to wipe out half of all characters of CR 10 or less in that area, dealing 220 (40d10) to all others and creates a massive valley in the process. On a failure, it only wipes out a quarter of all characters of CR 10 or less in that area and deals half damage to all others.
Planet Strike	When this character makes an attack, it can target a moon or planet. If it does, it has a Percentage Chance to tears into the mantel of the planet, wiping out 99% of creatures on the planet and causing that planet to become largely uninhabitable for non-magical life. If it has already succeeded twice before with this attack against the targeted same planet, it turns the planet into a cloud of asteroids and meteors.
Reality Strike	When this character makes an attack, it can target the plane of existence it is in. If it does, it has a Percentage Chance to deal 1 point of Ruination to that plane (see Ruination of Planes).

Special Rules

• Attacks deal half damage to characters that are Colossal or larger, unless the attacks is a Called Shot. As well, creatures that are Colossal or larger cannot be knocked prone or forced to move except by characters of their same size or higher.
• Titanic characters can only be CR20 or higher.
• Immense characters can only be CR23 or higher.
• Enormous characters can only be CR26 or higher.
• Stupendous characters can only be CR29 or higher. Stupendous and larger characters always have the Immutable Form feature and are immune to the effects of the banishment, soul cage, plane shift, and imprisonment spells and only creatures of the same size or larger can paralyze, stun, grapple, restrain, or otherwise decrease its movement or actions.
• Tremendous characters can only be CR32 or higher. Tremendous and larger characters are immune spells that don't have a radius and to weapon attacks that aren't magical.
• Humongous characters can only be CR35 or higher. Humongous and Ginormous characters double their Constitution and Strength Modifiers when added to HP, ability checks, saves and damage rolls.
• Ginormous characters can only be CR38 or higher.
• Brobdingnagian characters can only be CR41 or higher. Brobdingnagian and Vast characters triple their Constitution and Strength Modifiers when added to HP, ability checks, saves and damage rolls.
• Vast characters can only be CR44 or higher.
• Astronomical can only be CR47 or higher. Astronomical characters and larger characters quadruple their Constitution and Strength Modifiers when added to HP, ability checks, saves and damage rolls.
• Immeasurable characters can only be CR50 or higher. Immeasurable characters cannot be reduced below 1 HP. However, a wish spell or successful Divine Intervention can remove them from existence, while they are at 1 HP.

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