When it's put into the graveyard from the battlefield, you may put its +1/+1 counters on target artifact creature, no matter what Power Depot's card types are at the time
It also contained 121 "play-test cards" that were all mock play-test sticker cards, with text ranging from "this could potentially see print" to "this barely works in the rules." These cards are of course not legal in any Constructed format, just the Limited formats you would play Mystery Boosters with
On the left hand side of the card, instead of strength, youll see the location cards movement cost
Going from a large amount of mana to a ton of mana is always better than it seems
The original and only printing has the word successfully cast a card
Even with that Deathmark still has a lower hit rate than a Shock in cube, has no alternate utility, is sorcery, and will wind up a totally dead card in some matchups