Its another Sarkhan the Masterless ability, and one that wins games
Coming down as a hasty 5/5 for means you can deal some damage right away, but its the random options that can truly swing a game: putting three +1/+1 counters on target creature, putting a shield counter on target creature and gaining three life, or fighting another target creature a foe controls
Nylea, Keen-Eyed is still a useful card in green Commander decks, sometimes as the commander, even in try-hard (but in my mind pretty underpowered) cEDH attempts
1 Urza, Lord High Artificer Works Well With Any Artifact Build 9,488 Decks on EDHrec.com Urza, Lord High Artificer is the most popular mono-blue commander, and Commander players should be aware that playing such a deck will often make them a huge target, especially in more casual groups