Full Set Bonus: Witherborn Spawns a wither minion every 30 seconds up to a maximum of 1 wither. Your withers will travel to and explode on nearby enemies.
Upgrading the armor will keep all existing upgrades such as stars, reforges, potato books and enchantments. Variants of Wither Armor can also be converted between each other using the appropriate Precursor Relic.
When the armor was first released, crafting Wither Armor into its upgraded form would keep the color code of #000000, creating incredibly rare, "exotic" colored armor.
On March 1st, 2022, an update was released, containing a bug that caused the same thing to happen, making colored armor worth much less.
This was patched within a few hours, but many new black variants were created in that time.
Since the release of Pure Black Dye, these armor sets aren't exclusive anymore, but they still won't be easy to get as each dye costs 250,000 Bits.
DIVINE (previously SUPREME) Wither Armor and its variants were possible to obtain if the armor was glitched and was recombobulated twice from opening Dungeon Reward Chest.
Sometimes while a player is a ghost in dungeons, the full set ability will still spawn and explode on enemies.
Donating any of the 4 Wither Armor variants to the Museum gives credit for Wither Armor, but donating Wither Armor does not give credit for any of the variants.
The best way to get credit for all 5 items with the minimum amount of donations is to donate Necron's Armor.