This list tore through diamond with a 16-4 record over last 20 games to get me into masters this season. Eternal confirmed pay2win, as this thing is not easy on the shiftstone.
Sometimes you get to Build-a-Bear(Ker)-asaur by giving it charge and berserk, which is kinda neat. Cirso noms Vara and ChaCha and other units that are typically a pain to block.
You can push a surprising amount of damage, so you're probably the beatdown in any non-aggro matchup.
Edit: only played 4 games since the Stinger nerf, but won all 4. Reality is every one of your low drops requires an answer, so if they torch stinger you're ramping, or hitting with teacher, or drawing berserk dudes. Threat density is often too high for opponent's removal.
Also credit to Gozu for his Combrei Xumacan list, which I used as the jumping off point for this. Dunno if you can actually run Xumacan here through, we ramp a lot and don't have Elysian Insignia, so getting 5T isn't guaranteed. Cirso fills that slot just fine.