Spell Knot (5e Feat)
From D&D Wiki
- Concentration spell in your Spell Knot ignore the Casting another spell that requires concentration portion of the concentration rules but must abide by the rest.
- While maintaining concentration on a spell, you can spend a action to transfer it into your Spell Knot with a successful Constitution check against a DC of 5+ the spell level, on a failure you lose concentration on the spell. If your Spell Knot already contains a spell they are swapped instead.
- A bonus action can return a spell from your Spell Knot to your concentration
This feat may be taken multiple times, with a new Spell Knot gained each time.
Spell knots are physically draining, each Spell Knot you have active beyond the first drains 1 hit point per maintained spell level per round.