2 Simple questions.
Does the 20% of critical strike damage converted to true damage apply only to the 100% of your attack damage in extra damage added by the critical strike or all
100% of your total damage with both attack and bonus crit damage considered (I assume it means all 200% of your attack damage), and does this imply that ability interactions with crit such as 
's E will also be doing 20% true damage aswell when it crits? I hope so.
And then Conquerors? :P
First question: The text implies that the critical strike damage is the portion of the attack that gets the true damage conversion. So, an auto attack with base AD of 100 would critically strike for extra 80 physical damage and 20 true damage.
Second question: If the item increases the general critical strike damage, and not a special case scenario critical strikes (such as Shaco or Ashe), then it should work on every on-hit effect that can critically strike.
This new IE just might make Tryndamere a king again! :)
