Meta Rule:103

If a Special calls for some type of discard to occur (and no secondary effect), then the targeted Character must fulfill at least one of the conditions specified by the Special (e.g., "Remove 1 Hit" can only be played on a Character who has a hit; "Discard a placed card and remove 1 hit" can be played on someone who has a hit, or someone who has a placed card, or someone who has both). If the specification is not known or the Special has a secondary effect which would come into play (e.g., "Discard one {type} card from hand") then the Special may be played regardless.