So, in short this is my idea:

1º - EVERYTHING have 1HP, and I mean every single thing  in the game: orcs, dragons, Swords, trees, stones...

2º - EVERYTHING that loses its hit points...explodes. 

To hurt anything, you have to overcome a confrontational roll of force against resistance: a success the objective explodes, a failure nothing happens, a critical failure and it is your weapon that explodes (a critical failure punching a stone and it could be you who explodes ...)

Weapon skill will be very important, as it will allow you to deflect the hit to your weapon or your shield, although in that case they could explode and you will be in danger.

The fighting will become extremely dangerous, forcing you to look for other less risky strategies and your weapons, armor or shields may blow up in the middle of the fight, forcing you to retire.

On the other hand, new ways of dealing with puzzles and dungeons are created, since everything is destructible: doors, walls, chests, tables, chairs, horses...