Urza does a ton, creating a creature token, generating mana, and giving you free cards which is just incredible
The easy picks are going to be The Gitrog Monster, Crucible of Worlds, and Ramunap Excavator
The third replaces Scion of the Ur-Dragon and actually slows the deck down quite a bit
In the green class enchantments defense, it just distributes +1/+1 counters as you play the game, provides minor ward protection to the cards you're growing, and the final mode does give your planeswalkers double loyalty on a plus ability
The Sibsig Ceremony An enchantment that allows us to cast creatures for less is potentially broken
Repair Action Repair is an interesting card because it is one of the first cards weve seen capable of removing damage from location cards