Duel Monsters Valkyrion the Magna Warrior
Be sure to include many fodder artifacts, which you can sacrifice for huge mana payoffs like Triplicate Titan, Chiss-Goria, Forge Tyrant, Myr Battlesphere, and Cityscape Leveler
Player B does not respond to this, so the chain resolves by Player A first Magi Summoning "Caliginous Magician of Chaos" in Attack Position, followed by Player B's "Mystical Space Typhoon", followed by Player A's now-useless "The Grand Spellbook Tower"

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What should I do