Even on his stats alone, a 5/4 for four mana with no drawback is extremely good

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Hate Mirage (Card) Hate Mirage 0.39%inclusion 18.7K decks 4.74M decks Oct 16, 2019 Commander Showdown - Trostani vs Ghired Populate versus Populate
This new version of Elves is great fun and brings a new angle from which to attack the Modern metagame, with a more aggressive bent
Its a little slow, though, unless you can put +1/+1 counters on it quicker
Its a flex, sure, but its also a way to preserve a card thats central to your deck and your playstyle