The Winged Dragon of Ra - Sphere Mode is an interesting tech card that has faded in and out of competitive play thanks to its summoning conditions
The problem is that Un-sets tend to rely heavily on inside jokes and references to old cards that many new players probably won't understand
The first, constellation, just rewarded you for playing the card type: enchantments
As the sole five-color legendary creature, he serves as the catch-all for the rest of the cards from the set
There are only so many ways to make The Ring tempt you in Commander and many cards that spread ability counters do so to non-human creatures
Gaea's Blessing (T1, Ext, S, Block) Technically a cantrip, Gaea's Blessing puts your best cards back into your deck (or your opponent's cards into his deck), plus gives you a chance to draw them back