When she was first spoiled, I saw her as sort of a "poor man's" Rhys the Redeemed. She's nowhere as good as the popular token Commander, and she's also mono-green whereas Rhys is both green and white. This somewhat limits her as a Commander, although she is certainly a plausible choice if mono-green Tokens is what you're looking to build. Really, though, she's better as a member of the 99 in Trostani, Selesnya's Voice and the aforementioned Rhys the Redeemed.
Oviya's tap abilities are decent for a 1 mana 1/2 creature. Her first tap ability costs 2G and creates a 1/1 colorless Artifact creature token. While this doesn't seem like an awesome ability, with cards that double tokens like Anointed Procession alongside it in Standard, plus Doubling Season or Parallel Lives in EDH, it's perfectly fine. It's comparable to Rhys the Redeemed's ability to create an Elf token.
The seond of Oviya's tap abilities is quite good for 4G. It creates a X/X creature token where X is the number of creatures you control when you resolve the ability. This token is almost always going to be worth the cost and is great to have in an aggro deck. It's especially good when you have Procession or another token doubler on the board.
Really, you can't ask much more from a one-drop creature. For a card that doubled in price from $0.25 to $0.50 in March of 2018, though, it's not like she's blowing people away. She's just very good as a role player. However, as she is good in EDH, it's not a bad idea to invest in foils, as not only are they more reprint proof, but her long-term value will be in EDH. They will provide better return on investment in the long-term. While I don't see Oviya as a long-term staple anywhere, she's a solid Legendary creature worth having in your collection.
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