This is a very fun deck — it requires a good understanding of how it works and isn't ideal for ladder climbing. Ruehin is one of my favorite Monster cards and got buffed this season, so here it is. I won't say this is a meta or very strong deck — it's more of a binary deck.
The game plan is to play one copy of your bronze units in round 1 to set up the Necromancer's Tome. Use Ethereal in round 1 if available. You can also use She-Troll round 1 to win the round. Caranthir is used to copy She-Troll or Ruehin depending on hand and board condition.
After winning round 1 go for an all in in round 2 or 3 depending on hand size — we ideally want longer rounds. Play Ruehin then recall your bronzes. Ruehin is best paired with Wererat. If you have She-Troll or Vran on board that's even better. If possible play Slyzard first then Wererat on the melee row.
Make sure to always keep one special card in deck — ideally The Last Wish.
Watch the video for gameplay reference and strategy.