This clever graveyard loop uses Leonardo, Sewer Samurai to cast Rograkh, Son of Rohgahh from your graveyard for free over and over, turning your graveyard into an endless supply of cheap fodder. Each time Rograkh enters the battlefield, you feed it to Bartolomé del Presidio to grow its power and trigger endless sacrifice and death effects. The true engine of the lock, however, is Solemnity; by preventing any counters from ever being placed on creatures, it completely bypasses the finality counter that Leonardo would normally slap on Rograkh to exile it, letting the little Kobold return to the graveyard indefinitely.