Dungeon defenders 2 witherbeast

Description
The Wither Beast is a support enemy type that has no attack but burrows and projects a pink aura. Once burrowed, the pink aura increases damage taken by defenses, heals allies and heals itself as long as they are within the aura. It has a natural resistance to damage reducing the damage it takes by 50% making it harder to kill than enemies with similar life totals.

Strategy
You will want high damage per second defenses to deal with these as quickly as possible and preferably before they burrow near your defenses or Cores.