Just stack up a few cantrips like Portent and Opt , then cast Elemental Eruption and copy it with Stella
Garna, the Bloodflame Garna, the Bloodflame is a card that fits considerably well in sacrifice decks
(The exact restrictions are more specific, but thats the general idea.) Other formats, such as Modern and Legacy, dont rotate at all, meaning the pool of cards that you can choose from grows with each new set release
Theres a few cats with removal as part of their enters abilities, and you can use cards like Elesh Norn, Mother of Machines to double those triggers
Notably, you can also only cast a plotted card as a sorcery , regardless of its card types
Commander is a format that is open to many different strategies and understanding how to play is a beast compared to some other formats