Nothing has a way to access it outside of commands or the creative menu. Works on servers. The small effect is not compatible yet with capes or elytra. Designed with player health around 100. A lot of additions will kill you in one hit at default health.
Additions list
Items
Banishment - Banishes selected entity to the nether for up to 60 seconds, ending early if the caster takes damage. If both are already in the nether, will instead vanish to the overworld. Use shift-right click or Z/X keys (defaults) to select a target.

Beans - A retextured dog who stays the size of a puppy, boosted health, speed, and damage slightly. Command her to attack by using shift-right click or Z/X keys (defaults) to select a target.

Bigby's Hand - A floating hand that has multiple modes: Clenched Fist(Punch), Forceful Hand(Push), Grasping Hand(Grapple), and Interposing Hand(Block). Command it to act by using shift-right click or Z/X keys (defaults) to select a target. Select the mode before casting by pressing the B key (default).

Blink - Short teleport on a low cooldown. Teleports in direction of travel or if not moving then will teleport in direction of look. Smart in that it will attempt to place the player on a surface that is not lava. Shift-right click cycles through distance from 5-15 blocks.

Chain Lightning - Powerful attack that hits multiple targets, be careful not to stand too close as it will target the caster as well.

D20 - Rolls a D20 for the specified skill and announces the result.

Darkness - Creates a zone of darkness.

Dimension Door - On use, lifts the player into the skies. Using it again teleports the player in the direction they choose.

Disintegrate - Shoots many small damaging particles.

Divine Smite - When enabled, enhances your next three attacks with extra damage. Attacks can be of any type, ranged or melee.

Ember Blaster - A chargeable ray gun. Max Charge: 15 seconds

Enervation - Links the caster and an entity, draining health from the entity and giving it to the caster.

Fireball - It is a fireball. The explosion caused by the fireball will not damage the caster.

Firebolt - No cooldown, modest damage.

Flying - Enables creative mode flying for 15 seconds.

Glimwickett's Hat - Grants immunity to Slow, Mining Fatigue, Nausea, Weakness, and Incapacitated.

Grappling Hook - Attach to targeted surface. Shift-Click to impulse toward the anchor point.

Haste - Applies resistance, speed, haste, mining haste, and strength.

Healing word - Heals targeted entity. Use shift-right click or Z/X keys (defaults) to select target. V key (default) to select self. C key (default) to clear selection.

Hold - Inflicts paralysis. Use shift-right click or Z/X keys (defaults) to select target. V key (default) to select self. C key (default) to clear selection.

Invisibility - When not moving, acting, or taking damage for three seconds, turn invisible.

Javelin - Remodeled trident with reduced melee damage, but the ability to stack multiple.

Lay On Hands - Pool of health expended on use and regenerating over time. A heal of 20 will also cure the target of negative effects. Melee range. Use shift-right click or Z/X keys (defaults) to select target. V key (default) to select self. C key (default) to clear selection.

Magic Missile - Projectile with strong homing effect. Use shift-right click or Z/X keys (defaults) to select target. V key (default) to select self. C key (default) to clear selection.

Polymorph - Targeted Mob/Player turns into the selected entity. Bosses, the vex, and piglin were excluded from options to transform into. Use shift-right click or Z/X keys (defaults) to select target. V key (default) to select self. C key (default) to clear selection. Use B key (default) to select the entity type to transform into. [Bosses are too high CR for this spell, the vex can go through walls and barriers allowing players access to off limit areas, and the piglin's AI was more complex than other mob types, I might try adding it later if the party requests]

Raulothim's Psychic Lance - Does good damage and causes the incapacitated effect. Use shift-right click or Z/X keys (defaults) to select target. V key (default) to select self. C key (default) to clear selection. Use B key (default) to select an entity that has a name as a target.

See Invisibility - Grants the see invisibility effect.

Shadow Demon - Wither skeleton with leather armor. Changes between melee and ranged depending on target distance. Use shift-right click or Z/X keys (defaults) to select target. C key (default) to clear selection.

Sneak Attack - Upon use, Makes the next entity take bonus damage from the user's attack if the attack is behind the entity.

Stamley - Remodeled horse who can walk through leaves and climb walls.

Telekinesis - Move blocks, players, and mobs around.

Teleport - Teleports to specified coordinates in the menu(B by default). Can save locations as well for ease of travel.

Enchantments

Dragonslayer - Does bonus damage to the ender dragon.

Venomous - Applies poison effect on hit.

Effects

Haste - Increases attack speed and gives cooldown reduction.

Incapacitated - Cannot attack, place blocks, or use items.

Paralyzed - Incapacitated and cannot move.

See Invisibility - Ignores the invisibility effect on other entities.

Small - Makes the player half sized. Player can fit through one block gaps.

GUI

Health Bars - Above all living entities, their current and max health is displayed. On the player's HUD, the hearts have been edited to act as a percentage gauge with the total health beside it.

Event

Bleed-out - Roll death saves when reducing down to zero health for a chance to get back up. Damage is an automatic fail.

Entity Defense - Entities that have an attack will attack back when hit. This was added mostly for when a player is polymorphed as a hostile mob, so that the mob the player is attacking will fight back.

Function

Spectate on Death - When player dies, they are placed into spectator mode at the location they died at. This overwrites spawning at bed or at world spawn.

Explosives Damage Reduction - Explosions have their damage divided by 4 allowing for larger explosions without killing everything too easily.

Persistent Infinite Effects - If a player dies with an infinite effect on them, it is reapplied.

Cooldown Display - Hover over an item on cooldown in your inventory to see the cooldown.

Hide Invisibility Particles - If an instance of invisibility is given to anything, it will not display invisibility effect particles.

Invincibility Frames Edit - I-frames act independently from the source, meaning that if two different players attack the same mob it will take the full damage of both attacks, but if the same player attacks it twice with the same weapon during the I-frames it will not do damage as default.

Mounted Combat - Player's have an extra block of reach while mounted to make it easier to fight on horseback.

Commands(All of these except for track requires OP or Cheats enabled)

Create(/create) - Creates potions and tipped arrows with custom durations and effect amplifiers. Use /create enhance to combine multiple effects onto the same potion/arrow. Inventory must have space for created item.

Force Enchant(/forceEnchant) - Allows player to put any enchantment onto any item type and of any level amount up to level 127.

Prevent Map Destruction(/preventmapdestruction) - When set to true prevents explosions and players who aren't in creative mode from breaking blocks. Currently, this is not persistent meaning it will need to be reset each time you load the server if it was changed to true.(defaults to false)

Reset Cooldown(/resetcooldown) - Resets the cooldown of the specified player's main hand item.

Revive Command(/revive) - Puts the specified player into survival mode and places them at your position.

Set Max Health(/maxhealth) - Sets specified player's max health to the specified number. This does not heal the player.

Track(/track) - When holding a compass, sets the compass to point at the specified players current position. This does not update, meaning it will point at the position they were at in the moment that the player uses the command. Does not work if target player in invisible or in a different dimension.

Patchwork's DND Addons