This loop relies on a brilliant recursive recycling plant fueled by Selvala, Heart of the Wilds, whose ability taps for a massive influx of colored mana based on the greatest power among your creatures. With that mana, Slimefoot and Squee uses its activated ability to sacrifice a Saproling token—produced automatically by its own entry trigger—to pull both itself and Selvala right back out of the graveyard. Meanwhile, Bartolomé del Presidio acts as the essential sacrifice outlet to bin your key pieces on demand while steadily growing larger with every sacrifice, ensuring the engine can reset instantly. While Frostcliff Siege sits quietly on the battlefield, the rest of the crew works in perfect harmony to generate limitless sacrifice triggers, enter-the-battlefield events, and towering stat boosts.