Mana variance is as integral to the game as life totals and the combat step
Dont worry if youre confused or have any questions when it comes to cosmetic items in MTGA
Getting two Consecrated Sphinxes or two Keiga, the Tide Stars is very strong
Then, at the beginning of your combat step, you can pay three energy to create a copy of one of your permanents, make it a 5/5, and sacrifice it at the beginning of the next end step
Almost entirely because of duplicate protection, they have now 100% lured me in as a customer to start seriously playing on MTG Arena and spending money, while also still collecting Common, Uncommon, Rare sets on MTGO (though no longer Mythics, it's too expensive to keep that up)
One of the biggest weaknesses with running an archetype so heavily built around Dinosaurs is that, normally, the mana curve of the deck is quite high