You don't need a lot of this effect in your cube but the odd one is nice
If the target creature is an illegal target as Y'shtola Rhul's ability tries to resolve, it won't resolve and none of its effects will happen
Teased by Wizards multiple times ahead of its official reveal, its safe to say MTG players were seriously excited by this card
However, despite the small set size, there are plenty of cards that are very valuable and will cost a pretty penny if you want to obtain the fanciest versions available for the cards
At some point, I saw and built a Grixis Dragonstorm Commander deck with cheap ramp spells, tutors, and fast mana to build up into a large Dragonstorm, and swing for the win with hasty dragons thanks to Dragonlord Kolaghan or a convoluted combo involving Worldgorger Dragon and Animate Dead, making it one of the funniest decks Ive ever played with
A decade later, the Council of Marks (Mark Purvis, Mark Globus, and myself) decided we were going to get another Un- set made, but the path to get there wasn't very clear
