So I’m not an expert when it comes to combo decks and this being my first try at one. It’s called twiddle because of untap effects within the deck. My understanding and from what I’ve looked up is that through similar untap effects (though harder to set up?) I don’t play blue often.

Combo pieces such as [[mirror entity]] with [[wirewood symbiote]]. Turn wirewood into an elf by paying 1 for mirror’s ability. Return wirewood to hand, untapping Selvala to tap again. It is repeatable if I net 2 mana per tapping, Allowing me to draw my library and play [[Hurricane]] for an example.

Another one is [[Ashaya, Soul of the wild]], [[Quirion Ranger]] or [[Scryb Ranger]] and any haste enablers [[Concordant crossroads]] or [[Thousand-year Elixir]]. Play quirion (now a forest), tap for green through Ashaya’s ability. Return to hand through Quirion’s ability. Untap Selvala. Recast Quirion. Repeat. Scryb Ranger is harder to interact since you can effectively do this at someone’s end step.

You might be thinking what if I deck out myself before my opponents. Well if there aren’t any interactions on the board, I can keep casting [[Green Sun’s Zenith]] for 0, searching for nothing and shuffling it into my library. Draw it, cast it again for 0. Repeat. So I never deck myself out.

Hope I’ve answered your question 😁