Overgrown's Origins: Twinborn

The Twinborn is an origin for Overgrown's Apoli and Origins, rebuilt from InkBat's Twinborn origin (see video below). A Twinborn shares everything with their second half, from stats, to health, even being tethered together.

Installing

Put the folder (or a zip of it) in the world's datapacks folder and in your resourcepacks folder. The resource half carries the menu icons, the portrait frame, the red thread and all of the text.

Bonding

A Twinborn needs a twin. Find another Twinborn, look at them from within 6 blocks, open the twin bond menu with the Origins primary key (G unless you changed it) and choose the heart in the middle. They get a message and have 30 seconds to do the same while looking at you. Once both of you have chosen, you are twins.

The bond lasts until one of you takes another origin. That also works while the other twin is offline: they find out the bond is broken when they next join.

The twin bond menu

Every slice except the last two comes in a pair. The inner ring asks your twin for something and the outer ring gives it to them. A trade only happens when both of you choose the matching slices within 10 seconds of each other, so either twin can start it. Your twin sees a message with their own key binding, a short timer appears above their hunger bar, and when they open the menu the request waits for them as a gold button in the middle.

Slice	Inner ring	Outer ring	One step
Top	Call your twin to your side	Go to your twin	Works across dimensions
Max Health	Ask for max health	Give max health	2 hearts, from 2 to 18 hearts
Armor	Ask for armor	Give armor	4 armor points, up to 16 either way
Attack Damage	Ask for attack damage	Give attack damage	2 points, up to 8 either way
Attack Speed	Ask for attack speed	Give attack speed	1 point, from 0 to 8
Reach	Ask for reach	Give reach	Half a block, up to 2 blocks either way
Speed	Ask for speed	Give speed	A fifth of your speed, from 20% to 180%
Experience	Ask for a level	Give a level	One level
Bottom	Tie or cut the red thread
Upper left	Send items		Items within 3 blocks of you

Both twins start even, and whatever one of you gains the other loses. Hovering a slice shows exactly what the trade does, such as "You: 10 hearts now, 12 after". A slice you can't use right now is grey and says why: you already hold everything your twin can give, you have nothing left to give, or you need at least 4 armor points of your own before you can give armor away. When the bond breaks, both twins go back to even.

Sending items moves the items lying within 3 blocks of you to your twin's feet, in any of the three vanilla dimensions. In a dimension added by another mod it only works when both of you are in that dimension.

Living as twins

Your twin's face sits in a small frame in the top left corner of your screen. It dims while they are offline and shows a knot while the red thread ties you. Hold sneak to see your twin glow through walls.

The red thread is 12 blocks long. Tying it needs both twins to choose it while standing within 12 blocks and in sight of each other. While it holds, it pulls back whichever of you strays too far, both of you can climb walls, and falls hurt half as much. Either twin can cut it from the menu without asking.

The Shared Blood power links your breath, food and effects. While you have full breath your twin can't drown, and the same goes for you. Food you eat feeds your twin a little. Potions you drink and the effects your food gives reach your twin too, and so do the poisons and other harmful effects creatures put on you when they hit you.

Never Alone is the drawback. While your twin is offline you can't move, build, break, attack or use items. You wait in a grey world, invisible and unhurt, until they come back. An Orb of Origin still works, so a player whose twin never returns can choose again. Whenever your twin dies, you die with them.

Differences from InkBat's version

• The origin is twinborn:twinborn and every power uses the twinborn namespace. Old pairings and stats don't carry over.
• Pairing and trading go through the twin bond menu. Hotbar slots no longer pick the stat, and slot 9 no longer pairs.
• Reach uses minecraft:player.block_interaction_range and minecraft:player.entity_interaction_range, which Apoli also provides on 1.20.1, so Reach Entity Attributes isn't needed.
• The tether is now a real rope between the twins.
• Effects reach your twin when you drink, eat or get hit. Effects from beacons, conduits and splash potions stay with you.
• Your twin's food is topped up with one point and some saturation for every meal, where the old version handed out a full second of Saturation.