Scroll Rack will do awesome work here, putting any high-cost creatures you may have drawn and put them back on the library for Durnan to trigger into
6 Zinnia, Valley's Voice (#104) Borderless Raised Foil Zinnia, Valley's Voice is a Commander card that wants players to jam their deck full of creatures with powerful enters the battlefield abilities, so they can take advantage of offspring to trigger them twice
Some examples: Swords to Plowshares, Teferis Protection, Chaos Warp, Great Train Heist (or other Spree cards, you pay extra costs but can go wild), Akromas Will, Deflecting Swat, Wear/Tear, and my personal favorite, Reprieve
Maybe you have some of these sat in your binder at home or even displayed with pride
Then put all the chosen cards onto the battlefield simultaneously