Boon of the Steel Fist (5e Epic Boon)
From D&D Wiki
Boon of the Steel Fist
You hand is so hardened that you can punch through walls. Your unarmed strike deals 1d12 bludgeoning damage, and deals double damage against objects. You can instead quadruple your unarmed strike's damage against objects, but must finish a long rest before you can do so again.