Spell Twine (5e Spell)
From D&D Wiki
|Casting time:||1 minute|
|Components:||V, S, M (A red string tied around the caster's wrist, and the target's wrist)|
Upon casting this spell, you create a magical bond with the target. For the duration, when you cast a spell with a range of "self" or "touch" targeting yourself, the bonded creature may choose to benefit from that spell as well.
At Higher Levels. When you cast this spell using a spell slot of 8th level, the duration increases to 4 hours. When you cast this spell using a spell slot of 9th level, the duration remains as 4 hours, but you may select two separate creatures to benefit from this spell.