This clever synergy turns the humble Memnite into an infinite sacrifice engine by leveraging the passive abilities of your support pieces. With Solemnity on the battlefield, its replacement effect prevents finality counters from ever being placed, entirely bypassing the downside of the creatures you cast from your graveyard. This allows Leonardo, Sewer Samurai to repeatedly grant recursive access to your graveyard for your zero-mana artifact creature. Finally, Atog happily consumes the endlessly returning automaton to continuously grow in power while generating an infinite storm count and endless sacrifice triggers.