New enchantment to the axe - Executioning

Executioning would be an enchantment put on aces for combat. With it, any critical hit damage will be increased by 50%.

With level 2, there would be a 100% increase

But, there is a drawback, axes with this will do less damage normally. An axe would do the same damage as an axe one tier down, and two tiers down (for both levels respectively)

For example, a diamond axe will do do the damage of a stone axe with executioning 2, but will do the normal damage of a diamond axe plus executioning damage when you crit.

(Note, this doesn’t increase the base damage of your axe, only the extra damage done by critical hits)