Sylvan seems really powerful when you don't know how it works, I reached KoG using it, and people make so much misplay against this deck,like Alien Players putting counters on the wrong cards.
They're broken. I'm koG too. When a player just needs luck to win in a single turn, does it consistently, and there is nothing you can do to counter them unless your deck is specifically made to counter this, then it needs nerfs. Sylvans are a current poison to the gamd and users should feel bad using them.
As with most new decks, it would be Tier 0 the week it came out. We know what we're dealing with now. It's a meta deck that has good and bad matchups. Just like Aliens, just like Red-Eyes, just like Gladiators, just like any other Tier 1 or 2 deck.