This clever loop revolves around Shilgengar, Sire of Famine and Leonardo, Sewer Samurai, creating a self-sustaining engine of sacrifice and resurrection. Shilgengar happily converts your creatures into Blood tokens, setting up the board to replay your threats—a process smoothly lubricated by Memnite costing zero mana to recast from the graveyard. Meanwhile, Solemnity acts as the crucial linchpin that protects your engine, nullifying Leonardo's drawback by preventing finality counters from ever landing on your creatures as they return to the battlefield.