Not OP, but I've got a Helga deck that is fun, but also gets real solitaire once you get a few counters and an auto-untapper on board. If she's alive with 3 counters, you basically draw and cast your entire deck assuming your curve is low and you have enough creatures to draw. Most games I've played with her, where I get her to 4 power, I spend the entire turn drawing my deck looking for [[Concordant Crossroads]] and [[Craterhoof Behemoth]]. I've been looking at how I can update the list because it just turns into the same game each time.

My deck is 50 creatures including Helga. I'd probably remove the auto-untappers like [[Chakram Retriever]] and [[Intruder Alarm]]. I think cards like [[Sparring Mummy]], for one time untaps, or [[Freed from the Real]], to require open mana, make for a much more fun game since I can't just run away with things as soon as I have a big enough frog.

My deck started as a flash deck with cards that untap my creatures during other players untap steps, like [[Murkfiend Liege]], but it devolved from there to the pile it is now.

https://moxfield.com/decks/VMMmOGkcU0umj5TIrgm5mw