Takeru Homura notices that Yusaku has entered Duel Links, and after breaking through Duel Links to find Yusaku, she finds Yusaku and her child, and Yusaku shuts her mouth, but her Duel Bet makes her open her mouth
Black Mana Battery Rarity: Rare TYPE: Artifact SUBTYPE: - CMC: 4 Mana cost: USD: $5.15 EUR: 3.75 TIX: 0.00 EDHREC RANK: 25446 , : Put a charge counter on this artifact
The deck then adds powerful ramp spells (Hour of Promise, Dance of the Tumbleweeds, Map the Frontier), removal (Desert's Due), and utility spells (Trash the Town)
Having flash gives this card a lot of flexibility too since it allows you to leave up mana for potential counterspells or removal with the option to just flash it in before your turn starts if other actions aren't needed
It's also summoned through King Dragun to make swings even bigger