This gives our instants and sorceries Flashback
It appears that the drop can have different bonus cards, but how many there are is unknown as of now
What differentiates it from other artifact payoffs is that it both costs a lot of nominal mana and protects itself via ward
(Whenever equipped creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .) Equip ( : Attach to target creature you control
The trick I figured out to do this was to count how many you'd already cast (okay, technically cards in your graveyard, but most likely they got there by you casting themcounting cards in the graveyard was easier than remembering how many you had previously cast) and incrementally increase the damage for each card
The beauty of split cards, unlike double-faced cards, is that both sides are always accessible at the same time, regardless of where the card is