Mistwyrm, Clock Tower Guardian

Discount: If you're playing this from your hand, you may [Remove 4 OWL or Dragon cards in your graveyard from the game.] to instead pay a cost of 2 to play this.

Potentiality Accumulation: When your opponent plays an event or when an allied unit attacks, add the top card of your deck underneath this as a charge.

"Potentiality Transfer" - Turn 1: When this attacks, you may put 2 of your charges on the bottom of their owner's deck. If you do, choose 1 ruler or unit and ready it.

Your ruler has Breakthrough.