Its no secret that I love spells way more than creatures, and the fact that its an instant has led to some pretty amazing mid-combat blowouts
And thats not all: remove flying counters from your creatures placed on them by Luminous Broodmoth, slow down the aging of Cumulative upkeep cards, like Mystic Remora (or Blizzard, if you feel like putting flying counters on opponents creatures like a monster), allow Undying creatures to continually un-die the (giant robotic manta in the) skys the limit
For starters, its seeing play in pretty much all the same decks as Lightning
Iconic cards are described as "extremely rare" with only two appearing in each set
Yiazmat is extremely difficult to defeat in-game, so since you went through all the perils of completing this sidequest, now your opponents have to go through the perils of battling this nearly indestructible ultimate boss
The following set, Shadowmoor, is not part of Lorwyn block, as originally announced, but the first set of the Shadowmoor block, another two set block