Colloquially known as Alpha, this set has some incredibly powerful cards, combined with the fact that it had a limited printing, and is more than 30 years old, makes just about every card from this set cost a pretty penny
Death Cloud Smallpox, but a bunch more times
I think the first ability making Dragons cost less overall is great, but the second ability is really where I would want to invest the most brain power into drawing giant swaths of cards and dumping powerful permanents like [casthaven]Crucible of Fire[/casthaven] or [casthaven]Coat of Arms[/casthaven] into play
Legendary Creature - Druid Plant Color tag templates(None) Champion of Lambholt Creatures with power less than this creature's power can't block creatures you control
Common cards are the most common, while Enchanted cards are the rarest
It promoted a whole slew of commons decks, which everyone could equally build, because of each decks low cost