While not a unique design in itself (each individual color got its own mana battery, and blue would later receive Iceberg in Ice Age ), this is a unique space for an Azorius card, and it has been efficient enough to allow Rasputin to see fringe play for years in Commander assuming you can find a copy
Playing Against It Sweepers are great if you have them, but if not you can stem the bleeding by saving your kill spells for engine cards like Teysa, Opulent Oligarch and Wispdrinker Vampire
Even without infect creatures, Hapatra itself can spread -1/-1 counters whenever it deals damage
Partnering with Toggo, Goblin Weaponsmith can be a good solution
For only two mana, this enchantment will gain you 4 or more mana per turn
Instead, it's because of how well this works as one of the Amber enchanted options