These were double faced cards that allowed you to play either side as you saw fit - one side was a somewhat overcosted spell, one side was an enters the battlefield tapped single color land
The Mastadon is the promo for the release events and for that date it has a picture next to the date
Overlord of the Boilerbiggles (or just Boilerbiggles) Overlord of the Boilerbilges, in yet another Seth malapropism
Only Magic: The Gathering has the design space to do something like this - where the return of an old mechanic actually feels very in-universe, and like a subtle inside joke, as well
Unfortunately, the Magic formats where its legal are also far faster and more powerful than this could ever keep up with, unless youre specifically looking for the highest possible density of cycling or eternalize effects
There are countless artifacts that give you value when sacrificed, like Myr Retriever and Chromatic Star