Sympathetic Binding

When unlocking the ability to use the 'Alar', you are able to cast 'Sympathetic Bindings'.
This Binding is a sort of link created between two targeted things within spell range.

When you create a bad Link, you have to put in extra energy (trough heat from your body or force from your muscles) because of the Law of Conservation of Energy.

You focus your Alar and mutter a binding, which intrinsicly connects two things within range through pure willpower.
If the targeted thing is a Creature, they must make a Spell saving Throw: DC = 8 + your proficiency bonus + your charisma modifier.

You can cast this spell for every piece of Mind you have available, and (See 'Split Mind' spell) Spell slots aren't used up when casting 'Sympathetic Binding'.

 In Combat, the utility of a Binding is determined by a d20 roll (plus modifier if cast at higher levels).

Link Categories:

0 < d20 < 6:         Poor link/High Slippage          
-> All damage and status effects inflicted onto a bound item are passed on to you, and a Creature receives a maximum of 5 damage.
Weight sum -> x5

5 < d20 < 11:      Usable link/Med. Slippage      
-> Half the damage inflicted onto a bound item is transferred to you, and the damage a Creature receives is halved.
Weight sum -> x3

11 < d20 < 16:   Good link/Low Slippage         
-> A maximum of 5 damage inflicted onto a bound item is transferred to you, and the Creature receives all damage and status effects.
Weight sum -> x2

15 < d20:             Perfect link/No Slippage         
-> No damage is transferred to you.
Weight sum -> x1

You have to determine what kind of Binding you will create (Parallel Motion, Chemical, etc.)

For example:
You link a stone to a creature with a 'usable link' by rolling a d20 and getting an 8.

Since the stone and the Creature are linked, they both weight as much as both things combined:  with a perfect link, they would both have the same weight: Creatures weight + stone's weight. Since the Link is only usable, the weight is tripled and when you want to lift the stone, you have to lift (Creatures weight + stone's weight)x3

Your next action is throwing the stone against the floor (since it's so heavy). The kinetic energy of the stone is transferred and you and the creature recieve blungeoning damage (decided by the DM) halved (since the link is usable).
Or you throw the stone in a fire or link it to a torch. You and the creature recieve fire damage every turn (again, determined by the DM) halved, as long as the link is there.

A certain kind of Binding can be improved by overwriting (casting the same kind of Binding on top of another one). You can stack different kinds of Bindings onto the same 2 objects.

For example:
binding a creature chemically (to a poison) and galvanically (to a fire) to inflict Acid and Fire damage simulteaniously.

In the books, this is used to take out a group of people as follows:

An opponent is killed and their corpse is linked to another opponent. Since they are both human, the link is pretty good (80% or so). The corpse's throat gets slit and the other opponent drops dead with his throat slit. This is repeated, but with stabbing this time. The next opponent receives stab wounds... It progressively gets harder to injure the corpse because of the link strength decreasing: damaging their skin begins to feel like trying to cut metal...
The body got more and more mutilated and the amount of links were insane...