Soul Twin

Origin Feat

The Soul Twins feat is an advanced option that shouldn’t be taken by new players or those that routinely control other creatures, such as captains and necromancers. If it is unclear how a spell or effect would affect the soul twins, the GM adjudicates the outcome. A good rule of thumb is that if it heals, harms, or grabs a twin, it affects only one; if it charms, curses, enchants, or protects a twin, it affects both.

You were born as a pair of soul twins, identical twins that share a single soul and act as an extension of one another. These twins function as a single character with two bodies, which you control.

Actions. Your twins share a single action, bonus action, and reaction between them, each of which can be taken only once by one of the twins on your turn. If you take the Dash, Disengage, Dodge, Help, Hide, Ready, or Search actions, both twins perform the action and gain its benefits.

Attacks. If you take the attack Action to attack with one twin, the other twin can attack as a bonus action. You don’t add your ability modifier to the damage of the bonus attack, unless that modifier is negative. If you’re able to make multiple attacks, you can divide these attacks between the twins.

Hit Points. Soul twins have separate hit points, which are divided between them. At 1st level, each twin has the hit points of a character of the same class. At higher levels, each soul twin’s hit point maximum increases by your Constitution modifier + half a roll of the class’s Hit Die (rounded up). If you use the average value instead of rolling the Hit Die, each twin gains 2 for a d6 class, 3 for a d8 class, 3 for a d10 class, 4 for a d12 class.

When you spend Hit Dice following a short rest, you must spend the dice separately on each twin.

Spellcasting. A pair of soul twins can only concentrate on one spell at a time. However, only one of the twins needs to concentrate on a spell to maintain it. When you cast a spell which requires concentration, you choose which twin is concentrating on it.

When casting a spell, either twin can provide the spell components, and the spell can originate from the twin of your choice.

Magical Effects. If a spell or magical ability affects one soul twin, it affects them both, unless that spell or ability affects hit points, or if the two twins are further than 100 feet apart. In either case, it affects each twin separately.

Conditions. A condition, such as being poisoned or grappled, affects only one twin, even if imposed by a spell.

Death. When a soul twin is reduced to 0 hit points and begins to make death saving throws, the other twin becomes incapacitated and its speed is halved. If a soul twin dies, the other twin quickly begins to deteriorate, and perishes 24 hours later if their partner doesn’t return to life.

Empathic Link. As long as both twins are on the same plane, they can empathetically sense the other’s emotional state. Each twin knows when the other takes damage.