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
// Shinryu, Transcendent Rival Legendary Creature Dragon 8/8 Flying As this creature transforms into Shinryu, choose an opponent
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
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
Perhaps another reason that we're seeing such an amazing reaction from fans is that there's a significant generational overlap between those who played FINAL FANTASY and those who played Magic
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