Many ideas and mechanics that used to be silver-border are now printed in black-bordered sets, sometimes 1-for-1 When people approach me about silver-bordered cards in Commander, the most common topics are (in no particular order) Host/Augment (and Surgeon General Commander), Acornelia, Krarks Other Thumb (and other coin flipping/dice rolling cards from Unglued), and Contraptions
They start in the Command Zone and would change the way decks are built for the format
You can only activate 1 "Nightmare Throne" per turn
Lord of Shatterskull Pass is a Minotaur leveler that needs a lot mana spent to reach his full potential but when he reaches level 6, he can be devastating for our opponents as whenever Lord of Shatterskull Pass attacks, it deals 6 damage to each creature defending player controls
It's also a popular strategy because it immediately increases the level of politics at a table, with planeswalkers able to fix most threats