Blazing Shackles

You fire two fiery tentacles forth from your body targeting one or multiple creatures of your choosing. The target must make a Dexterity saving throw. On a failed save, the target becomes restrained and takes 1d8 fire damage each turn. On a successful save nothing happens. Targeting one creature multiple times requires it making a separate saving throw, for each tentacle used.

At the end of the creatures turn, it may attempt a Strength saving throw against your spell DC. On a successful save the target gets freed from the shackles.

If the creature doesn't manage to free itself from the shackles until the spell ends, the tentacles throw the creature to the ground dealing an additional 1d6 bludgeoning damage and knocking it prone.

At higher levels: When you cast this spell using a spell slot of 6th level or higher, the number of tendrils created increases by one for every two slot levels above 4th.