Possibly the most important Curse in the entire deck is Curse of Misfortunes , as, on your upkeep, it lets you search your deck for another curse and attach it to them
Worldslayer Worldslayer is normally a card that is not worth playing, as the equipped creature destroys all permanents but itself
Youre exiling cards from your library so if you swing 40 tokens at someone to kill them, make sure youve got enough to stay in the game to fight your other opponents
And Im sure as hell not buying the $49.99 most popular bundle of avatars, card backs, and animated cards or whatever
Cards like Ghostly Prison are used to keep opponents from either making full use of attackers, or from preventing them from using combat tricks/counter spells
They may occasionally pop up in competitive EDH decks, the most notable being whenever Rick, Steadfast Leader shows up once in a blue moon in a Legacy Humans decklist