Create a 2/2 green Bird creature token with "Whenever a land you control enters, this token gets +1/+0 until end of turn."
With access to white, blue, and green, you can build a powerful EDH deck with it
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Updated by Chris Stomberg on January 5th, 2023: While there have not been too many noteworthy first strike creatures released since the original publishing of this article, a number of first strike creatures have come to our attention that function quite well in their specific niches
Here you can find a video of the card
For the longest time, this meant relying entirely on handtraps and negates, but that has changed significantly recently, as making boss monsters during the opponent's turn is more possible than ever