Apparently common decks being used by kids are Shaddolls, -tellarknights and Fire King-Fire Fists.
The two deciding Duels were apparently:
Shaddolls vs Heraldic Beasts. Shaddolls won.
-tellarknights vs Shaddolls. -tellarknights won.
Source:
The two deciding Duels were apparently:
Shaddolls vs Heraldic Beasts. Shaddolls won.
-tellarknights vs Shaddolls. -tellarknights won.
Source: