Wither Beast

Type	Etherian Enemy
Environment	Old One's Army
AI Type	Attacker AI
Damage	80 / 160
Max Life	1400 / 2800
Defense	40
KB Resist	95% / 96%
Banner	Wither Beast Banner
Immune to
Debuff	Withered Armor
Debuff tooltip	Your armor is lowered!
Chance	100%;
Duration	While within 25 tiles of a Wither Beast
Hurt	https://terraria.gamepedia.com/File:Dd2_wither_beast_hurt_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_hurt_1.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_hurt_2.wav
Killed	https://terraria.gamepedia.com/File:Dd2_wither_beast_death_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_death_1.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_death_2.wav
Hurt (crystal aura)	https://terraria.gamepedia.com/File:Dd2_wither_beast_crystal_impact_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_crystal_impact_1.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_crystal_impact_2.wav
Aura	https://terraria.gamepedia.com/File:Dd2_wither_beast_aura_pulse_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_aura_pulse_1.wav

Type	Etherian Enemy
Environment	Old One's Army
AI Type	Attacker AI
Damage	50 / 100
Max Life	500 / 1000
Defense	30
KB Resist	85% / 87%
Banner	Wither Beast Banner
Immune to
Debuff	Withered Armor
Debuff tooltip	Your armor is lowered!
Chance	100%;
Duration	While within 25 tiles of a Wither Beast
Hurt	https://terraria.gamepedia.com/File:Dd2_wither_beast_hurt_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_hurt_1.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_hurt_2.wav
Killed	https://terraria.gamepedia.com/File:Dd2_wither_beast_death_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_death_1.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_death_2.wav
Hurt (crystal aura)	https://terraria.gamepedia.com/File:Dd2_wither_beast_crystal_impact_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_crystal_impact_1.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_crystal_impact_2.wav
Aura	https://terraria.gamepedia.com/File:Dd2_wither_beast_aura_pulse_0.wavhttps://terraria.gamepedia.com/File:Dd2_wither_beast_aura_pulse_1.wav

The Wither Beast is an enemy from the Old One's Army event. When within 25 tiles of a player, it will surround itself with a 50×50-tiles aura of crystals, visually similar to the Dryad's Blessing, inflicting the Withered Armor debuff, which halves defense. The debuff will dissipate immediately after leaving the aura zone. Eventually, the Wither Beast will enter a state where it will remain stationary until it is killed. It will also regenerate its health when damaged.

Along with the Etherian Lightning Bug, it is one of only two enemies in the event that require the usual 50 kills to receive the respective Banner.