With four of these in your arsenal, you could mill almost half of your opponent's 60 card deck, and for a low cost as well
As you continue to venture deeper into the dungeon, you will often be offered a choice of which room and triggered effect you want to choose next: Until finally you reach the end of the dungeon, completing it
It is a common, and by how cheap a playset was I am guessing it did not rise to the level of a tournament staple
As a bonus, if Enkira is equipped with any cards, your opponents are forced to block her with creature, which can help whittle down your opponent's valuable creatures while you make unfavorable blocking scenarios.
This was never a hugely competitive Standard deck, but Cosmic Spider-Man could give it the push it needs