Kuchiyose no Planeswalker?

What would happen if summons weren't as rare as they actually are? What would happen if both the civilian and ninja world relied explicitly on summons? There's also this thing known as The Spark, with Naruto having it, what could possibly go wrong? Naruto/Magic the Gathering crossover. Younger!Tsunade. Warnings! Lemons and later Incest. Naruto x Harem.