Fields of the Warriors is one of the exclusive skills of Joey Wheeler. Added this September 28, it opens a path for Warrior and Beast-Warrior themed decks. This skill is definitely viable since Warrior and Beast-Warrior monsters have decent stats and effects.
Begin Duel with the Field Spell "Sogen" activated.
It provides Warrior and Beast-Warrior type monsters an early advantage because of the ATK and DEF boost at the beginning of the duel. Warrior and Beast-Warrior monsters with 1800 ATK becomes more deadly. Blue Flame Swordsman and Gearfried the Iron Knight are great examples that would benefit from this skill. Besides from having a high attack, the opponent will have a hard time on destroying them by battle even if they're switched to defense position because of their high defense.
I'm gonna help a lot of you out. You can still get this ability. If you already have Joey you can go into the Legendary Warriors structure deck and click the info button. It gave me the ability even though I didn't even create the account when the event happened.