black and white emerging powers booster box Pack Emerging Powers Blister (Cobalion Art)

That dot is called a color indicator, and means that the card is black

Reanimating Cauldron Familiar with Witch's Oven is super powerful, but it turns the game into a long and grindy meal of trauma and sadness, especially on Arena, where new Oven players just sit on priority forever, roping the game down to misery

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The usage of a Warrior Link-2 and Link-3 that can both accept generic materials (such as "Ferocious Flame Swordsman" and "Black Luster Soldier - Soldier of Chaos") can facilitate a version of this loop as well

From there, a Debris Dragon can bring out Iron Chain and score a quick 2500 damage, or a Dandylion play can allow for an even bigger Synchro Summon

The math works if you are targeting the right drops