of the cards in Izzet Phoenix, Faithless Looting is the best within the context of the Modern format
The most valuable contribution, in my opinion, were these two cards: Previous sets had dabbled in using -1/-1 counters a kill
There are additional ways to get value off of sacrificing creatures
Although it was never confirmed, these E ITION markings of the Base Ghost/Phantom Pikachu might have been added during the printing process as indication, so the 1st edition stamps would be properly aligned (which kinda failed in most cases)
Archdruid's Charm Archdruid's Charm gives you plenty of flexibility in the mono-green deck
Still cheap enough to play in those early, resource-building stages of the game, Rhystic Study is one of those cards whose presence is always felt in the game for as long as it's out