Chains from Hell

You summon three burning chains and unleash them towards three creatures within range. Each creature targeted must make a Dexterity saving throw or take 2d6 fire damage and be restrained. A creature can use its action to make a Strength (Athletics) check against your spell save DC, freeing itself from the chains on a success. 

At the start of a restrained creature's turn, it takes 2d6 fire damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you create one additional chain for each slot level above 2nd.