This engine spins into motion thanks to Wizard Class at Level 3, which turns every card draw into a fresh +1/+1 counter for your creatures. Mindless Automaton provides the initial fuel by trading two of its counters to draw a card, which in turn triggers Wizard Class to replenish them. Pir, Imaginative Rascal acts as the ultimate catalyst, supercharging that replacement so that the counters returned always outnumber the ones you spent, leaving you with a net gain of counters and cards to keep the loop going indefinitely.