The AI will generate a brand new card based on the name it is given
But Initiative does more proactively, both growing your creature quickly, dealing an additional 5 damage, and then eventually getting you another huge creature
Black has a bunch, including the infamous Exquisite Blood/Sanguine Bond combo and its variants
They are subject to change
Egon, God of Death / Throne of Death I think Egon, God of Death is an interesting card, but a little is difficult to make work
Some have dismissed it as purely a pack-ripping simulator, and while that's a little unfair, since enough people get enough enjoyment out of the game that there's even a small but growing competitive scene, it's clear that opening packs is placed on roughly equal footing to playing matches