Effrit's Heart

Unsheathed it gives off bright light for 20 feet
When Heat Metal is active as a bonus action gain
the following properties: Burn's brightly 120 feet
On your next melee attack add 3d8 fire damage.
Creatures take 1d4 fire damage and 1d4
poison damage when entering within 10 feet of
the sword for the first time on a turn or starts
its turn there. On a critical hit extreme heat causes
an ablation effect if the target is a large or smaller
creature move 10 feet away and blinded.