Using its own set of cards, its a new, completely distinct card game that Yu-Gi-Oh
Gains 600 ATK/DEF for each card in your hand
Special Summon this card from your hand or GY in Defense Position, then you can Special Summon 1 "Drytron" monster with 2000 ATK from your GY, except "Drytron Gamma Eltanin"
You can only activate 1 "World Legacy's Sorrow" per turn
Since the opponents never change their decks, overall replayabilty is limited, and deck construction leans less toward your creativity, and more toward winning potential of weakness/strength
5D's anime, the "Aesir" monsters are called the three Nordic God cards (and on one occasion, the Polar Star Gods)