The lore revolves around the intense battles between dueling legends, where the mastery of Synchro techniques can turn the tide of a duel
However, because he failed to look at the big picture, he opened a door for something to go wrong, and it cost him the game
The basic idea is to get two lvl 6 dragons (Mystletainn, Vajrayana, Gae Dearg), overlay for Atum, use Atum to summon Leyvaten, equip and special Dux with Leyvaten's effect, synchro for Trident, pop 2 with Trident's effect, overlay Gaia Charger on top of Atum and then attack for game
He also summons "Pumpking the King of Ghosts" to strengthen the zombie monsters with ectoplasm until it is destroyed by "Red-Eyes Black Dragon"
MARCH OF SWIRLING MIST I originally considered Propaganda for this slot on the list
With Chelcarain on the field, you have the opportunity to quickly bring various strategies involving Grass Pokemon into play