Both of these can be played as one use artifacts, to negate one good or evil enhancement, respectively.
Can they be played basically at any point the owner would like? For example, 3 player game, I make a RA against the player NOT owning Unsuccessful. Can the owner of Unsuccessful negate one of my enhacements?
Also, can these be used to negate set aside enhancements and enhancements in territory (like on a hero)? Thanks.