7 Stitch In Time It's All Or Nothing Three mana for an extra turn is enticing, but three mana to throw away a card with no effect is unacceptable
Eye of Nidhogg overwrites all previous effects that set the creature's base power and toughness to specific values
This combination has proven useful enough to be played in multiple decks in Modern Jeskai Breach, Esper Turns, UR Murktide, Grixis Shadow, and Arclight Phoenix
Given how cheap the initial cost is and the big impact it has, leveling up this enchantment doesn't need to be a priority, but if you have a few creatures on the battlefield and want to let your hand build back up, you can focus on pumping mana into upgrades
Another great thing about Coiling Oracle is that you can ramp with non-basic lands, and not just those with basic lands types but any old land you happen to hit