While the absolute counter-prevention is more than enough reason to play Chimil, Discover 5 also isnt to be scoffed at
Whenever Unesh or another Sphinx enters the battlefield under your control, you reveal the top four cards of your library, an opponent splits them into two piles, and you put one pile into your hand and the other into your graveyard
Obviously it doesnt save you from everything (oh, the infamously tricky regeneration mechanic), but it does do a lot
While Moat isnt always the most powerful card, there are plenty of flying creatures in Magic, you can shut down plenty of creature-based decks
You have very little wiggle room for cards that don't interact with the board directly, so keep things like pure card draw spells and discard spells to a minimum
Okay, yeah, the Shadowmoor elves are definitely nicer than they were back in Lorwyn