Size Domain

Following in the steps of Archon, these clerics are devout believers in the Great Resizing. Their powers enable them to manipulate the size of things, creatures, and even space itself.

Follower of Archon

When you choose this domain at 1st level, you gain proficiency in the History skill, and you gain two cantrips of your choice from the warlock spell list. For you, these cantrips count as cleric cantrips.

Channel Divinity: Grand Resizing

Starting at 2nd level, you can use your Channel Divinity to resize objects, creatures, or concepts.

As an action, you present your holy symbol. The target of your divinity reshapes itself, growing or shrinking according to your will by a number of size categories equal to 1d4.

Object:

You may target a number of objects equal to your Wisdom Modifier within 60 feet that is not worn. The object in question cannot be shrunk below 1 inch in any dimension, nor can it be grown above 30 feet in any dimension. Non-magical items are changed permanently, magical items are transformed until you take a long rest. During a long rest, you may choose to prolong the effect of a magical item resizing by opting to not restore your Channel Divinity. If a magical item stays changed for one week the effects become permanent. This has no impact on the value of the item changed.

Creature: 

You may target a creature within 30 feet of you to resize. If the target is unwilling, it must succeed on a Constitution Saving Throw against your Cleric Spell Save DC, suffering no ill effects on a successful save. The effects last for 1 minute, and maintaining the change requires concentration similar to certain spells such as Fly and Haste.

An enlarged creature gains advantage on Strength based skill checks and saving throws, but suffers a  disadvantage to Stealth checks and a penalty to AC and Dexterity Saving Throws equal to the number of size categories increased. In addition, its speed increases by 10 feet per size category increased. 

A shrunk creature gains advantage on Stealth checks and a bonus to AC and Dexterity Saving Throws equal to the number of size categories decreased, however, it suffers disadvantage on Strength based skill checks and Saving Throws. In addition, its speed reduces by 10 feet per size category reduced, to a minimum of 5 feet.

Additionally, all targeted creatures roll their weapon damage die twice. Enlarged creatures use the higher damage die, and shrunk creatures use the smaller damage die. 

Concept:

You may attempt to alter the size of something conceptual, such as the distance between two places, the density of an object, or the heat of a lava puddle. When attempting to do so, the resultant concept must fit within a 10-foot cube, must not weigh more than 50 lbs, and cannot have a value over 100 GP. To determine whether the change was successful, roll [roll]1d100[/roll]. If the number rolled is equal to or below your Cleric Level, the effect is successful.

Storage Capacity

Starting at 6th level, you can create a number of tiny glass beads up to your proficiency bonus. As an action, you can place one item inside the glass bead. The item must be no larger than 5 feet in any dimension. While in a bead, the item ceases to age and is protected from divination magic. You may only store one item inside each bead. As a bonus action, you may shatter a bead and release its contents into the nearest available space.

At 11th level, the size of items you can store increases to 10 feet in any dimension, and you can store a number of items up to your Wisdom Modifier.

At 17th level, the size of items you can store increases to 15 feet in any dimension, and you can store a number of items up to your Wisdom Score.

Potent Spellcasting

Starting at 8th level, you add your Wisdom modifier to the damage you deal with any cleric cantrip.

Entropic Eruption

At 17th level, you can release the chaotic energies of the Grand Resizing in a nova of size-altering magic. You gain access to the Enlarge/Reduce. This does not count as one of your known spells and is always prepared.

As an action, you may cast the Enlarge/Reduce on all creatures within 30 feet of you. You must target every creature within the range, however, each creature can be Enlarged or Reduced individually at the caster's will. When casting the spell using this feature, the spell requires no concentration. Creatures recently affected by your Channel Divinity: Grand Resizing have disadvantage on the saving throw to resist this effect.

You may use this feature twice per short rest.