This loop relies on transforming Sensei's Divining Top from a simple card-draw tool into a self-sustaining engine, powered entirely by Falco Spara, Pactweaver's ability to let you cast spells from the top of your library using creature counters as an alternative cost. Whenever you tap Sensei's Divining Top to draw a card and place it back on top of your library, Stark's Ingenuity triggers to place a fresh +1/+1 counter on the enchanted creature. That newly generated counter can then be immediately removed by Falco Spara, Pactweaver to pay the mana cost to cast Sensei's Divining Top right back onto the battlefield. While Gran-Gran's passive cost reduction and tap-draw abilities aren't strictly required for the core loop, its presence helps filter your draws and smooth out your mana if needed. The result is a continuous cycle that generates near-infinite artifact enters-the-battlefield triggers, storm count, and card draw without ever running out of fuel.