The perfect target for this card is your opponent with only one creature, and then either outcome is very good for you
Unlike with Cavern of Souls, though, these reprints will not be Standard or Pioneer legal
Discover is a keyword action, so it resolves if the ability on the stack does, similar to scry, mill, and surveil, among others
I'd designed a variant of Lhurgoyf called Revenant (it was black, had flying, only counted your own graveyard, and was */* instead of */*+1, but it was definitely me making a new Lhurgoyf)
Sword of Feast and Famine Sword of Feast and Famine beats out the rest of the Mirran swords and other Magic swords in general thanks to its very powerful triggered ability
If your opponent targets an MTG Ward creature with an ability or spell, that spell or ability is immediately countered, unless they pay the Ward cost