Flashback and Disturb cards are an option aswell
The Wandering Minstrel The trick to building The Wandering Minstrel well is to ignore three-fourths of the card
Mana rocks Next, we have mana rocks. These are artifacts that can tap for mana, like [c]Sol Ring[/c], [c]Arcane Signet[/c], and [c]Fellwar Stone[/c]
Card Errata Before [On Deletion] Delete 1 of your opponents Digimon with 3000 DP or less
So, knowing what cards are optimal for your blue deck's sideboard is essential
Lastly, Shiranui Spiritmaster can Special Summon another Shiranui from your hand or GY when it is Normal Summoned, and when it is banished, you can target and destroy 1 face-up card your opponent controls