The Stitched

The Stitched is a Warmode boss that appears when you do the following
 * Kill Brain of Cthulu,Skeletron,Skeletron Prime,The Twins, and The Eater of Worlds
 * Kill Soul of Cthulu to Get a Soul of the Undead
 * Craft a Stitching Needle using 60 metal and 1 Soul of the Undead
 * Drop the Stitching Needle in lava to spawn The Stitched

Stats
Skeletron/Skeletron Prime head: 500 health

Cthulu Brain: 650 health

Laser Twin: 150 health

Eater Arms: (Each) 300 health

TOTAL: 1600 health