Offsprings Revenge is a cool Mardu enchantment from Ikoria that can help you get more of those delicious attack triggers, while Ghouls Night Out is at its best when you get twice the fun before your Zombies decay
There are also a few from Final Fantasy (and maybe Assassins Creed) that could work in the right build
Foil Equinox, foil Borderless, both are possible, but NOT the Commander-only cards and not the Extended Art versions of cards
Gateway cards[] The Gateway Organized Play program was a program by Wizards to send promotional cards to players for participating in tournaments at local stores
Of course, it doesnt really work that way, you have to exile seven cards from your graveyard to do that, but who cares
It does offer choice removal pieces like Let the Storm Rage On and Benja Guardian of the Dragon Gem which are both staples for Steel decks