AVAWC makes the Block of Netherite immune to wither attacks and increases its blast resistance.
Description
AVAWC - Actual Vanilla Wither Cages
This is a pretty simple mod that makes the Block of Netherite immune to wither attacks and changes its blast resistance. It is similar to my other mod, Fabric Reinforced Obsidian (which adds to the game the Reinforced Obsidian, an EnderIO Wither-proof block), but it is more vanilla friendly. Also, it can (and, honestly, should) be used server-side only (or in singleplayer).