yugioh duel links nephthys deck Episode 35 – Roland, Start the Festivities! – The Assessment Yu-Gi-Oh! - Complete Nephthys Ritual

Ostinato is not once per turn so if you open multiples and one is negated you can use another

PSE Prismatic Secret Rare SE Secret Rare STAR Starlight Rare Related Cards View as Gallery View as List Endless Engine Argyro System X SPELL Send 1 "Therion" card from your Deck to the GY

You also want to play some creatures with landfall in their oracle text

Ursine Monstrosity

Although the card has not yet had its English version revealed at the time of writing, the Japanese version has caused a stir among the community

Since Commander's a singleton format to begin with (with exceptions like basics, Rat Colony, Shadowborn Apostle, and others), you can return all the permanents in your graveyard to the battlefield with this sorcery during the late game to finalize your win