Charged Backfist
Holding the heavy attack input performs a punch that IGN says can stun any enemy. When wielding a weapon, the attack changes to a weapon-specific hit described as dealing very high damage; it can sometimes down an enemy outright.
How it works
The move's value changes with what you are holding: the unarmed version stuns, while the weapon version can hit much harder. The supplied evidence gives an example of this skill's initial unlock and permanent investment cost, but does not establish that every skill has the same cost.
Read the supporting references
Skills and Dragon Shrine upgrades in Sifu. Covers named moves, passive upgrades, their documented effects, and supported requirements. Does not compare editions or claim current rankings. Guidance explains the referenced mechanics; it is not a tested damage ranking. Check the stated edition and source version before applying a patch-specific detail.