cr:1.4.3e

Effects that reference or apply specifically to an attack-proxy do not reference or apply to its attack-source.

Example: Sharpen Steel has the text “Your next weapon attack this turn gets +3{p},” which applies only to the attack-proxy created by a weapons abilities and then applies to the weapon as an attack on the combat chain; it does not continue to apply to the weapon when the weapon is no longer that specific attack on the combat chain.