Keep in mind that youre only at 8% per slot to get a foil anyway, so only about 32% of Collector Boosters would have even one foil
Its not even needed, but it becomes a powerhouse once you flip this into The Great Work, allowing you to play spells from everybodys graveyard on a big turn before you get Urabrask back
In the Yu-Gi-Oh TV show, Mai Valentine used a Harpie deck and famously used perfume on her cards so she always knew what she would draw next
The debut of Morph in Onslaught would eventually tighten up the screws on this idea and make it more functional in the rulebook
Early, he does nothing because at 7-cost you cannot afford him
If you have a way to give it a +1/+1 counter when it enters, with a card such as First Day Of Class, this counteracts the -1/-1 counter