This is important to the history of tokens because the Brand team let R&D choose what went on the back side of the ads
The worst aspect of this card is that these days, other decks can have a cheap cycler available and also benefit from the effect
But for now, count yourself lucky if you manage to score an Elite Trainer Box or a McDonalds Happy Meal holo card without fighting tooth and nail for it.
First, they boosted the power and toughness bonus it granted, then dropped the cost to only one mana to cast and equip, and finally made it so it gave the creature 1 toughness, and it ended up being that fateful 1 that made Skullclamp into a monster, since all you had to do was play one-toughness creatures and you suddenly had a repeatable, colorless, one-mana Divination
There are so many ways to completely break Skullclamp that it had to be banned in Modern and Legacy, but you can still use and abuse it in Vintage and Commander