whenever an opponent draws a card mtg Psychic Possession | Dissension Foil | Modern Sheoldred, the Apocalypse

That's what happens when you combine Tinker (which could get out the Jar almost immediately) with Megrim (so that your opponent would take 14 damage from a single Jar discard, assuming they could not play any cards in time)

As you can imagine, being forced to buy books to get one card did not sit well with everyone, resulting in the series stopping after 5 books and this particular methodology of implementing promotional cards wouldn't be used again

This makes exact print run numbers impossible to verify

Then there are non-basic lands that will give you specific numbers, such as mizzium blast furnace which gives you two red each time you tap it

These will rarely be passable as a real Magic card