mtg secret lair bonus cards list D&D x Cards!, Not sure if there are others to be pulled, but these were the bonus I got from each D&D Secret Lair. Reliquary Tower won, but the art on that Dungeon Delver SLD] Bonus cards for Venom

Oildeep Gearhulk Oildeep Gearhulk is the perfect midrange threat

When you factor in the back half, things get truly outrageous

Also includes cards that allow you to cast other instants or sorceries directly from a graveyard

Loxi: This could be pretty neat as a flashback/"cast spells from your graveyard" commander, but I do agree that only once per turn makes this tricky if you don't have ways to copy the trigger, and at that point you're really jumping through some hoops

With a full box, you're massively increasing your chances to find those ultra-rare pulls, complete sets of special treatments, and truly dominate your collection