There are also the Panoramas, one for each of the three Shards of Alara that let you pay one mana, tap and sacrifice them to search for one of that shard's three colours: Bant Panorama: search for a Forest, Plains or Island
But RG or especially UG also have the potential to stand alone, if thats where most of your exciting cards are
Starting with Pokmon-style elements, from your card name, ability, and action text to poses, outfits, and accessoriestotally free
Deathtouch is a very helpful keyword to have on a creature in the early game, and the ability to look at the top of your library and play lands and spells (with mana value 4 or greater) from the top of your library is pretty sweet
While in and of himself he would be a great card to have in limited, one of the block mechanics were "recurring" enchantments such as Rancor and Launch