So how does this one work?
Against a Champion, firstly can it target them, i.e. are they a unit (I'm guessing yes to this)? If it can, I'm guessing Swords on Shield force a Casualty Check (despite the text of the card), but what about rolls of Lore? Do these insta-kill the Hero, i.e. over-ride the Casualty Check?
Against a Leader, similar query. Does the roll of a Lore wipe out both unit and Leader, sans Casualty Check? Does it simply kill the unit and thus force the Casualty Check?
Your thoughts...?