The Rare spell pumps a target creature with two +1/+1 counters, along with keywords Vigilance, Trample, Lifelink, Indestructible, and Haste until the end of turn
I say missing in the sense that they would have been just as valid to include as say, Belenon, or in some cases, more so
By filling your deck with Angels, Demons, and Dragons with these types of abilities, you can free up slots that you would use for instants and sorceries with the same effects , getting them for free with an attacker instead of casting them
This pressures planeswalkers and players alike and is great for midrange decks
There isnt enough support for Giant tribal, although I dont need too many reasons to play Thryx, the Sudden Storm or Frost Titan
Convention promos, early expo promos, and store event promos can carry premium prices because supply is capped and the story behind them is strong