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How did this happen
If you really don't know anything about Yu-Gi-Oh, I suggest you look it up elsewhere (also where you living under a rock in the early 2000s?) As for my experience with the franchise, I enjoyed the anime as a child, and more recently the Abridged Series on Youtube, but was never really into the trading card game
Master Duel players Duels in the decamillions
It looks like your millennium puzzle and here's what the Ancient Scriptures say: " The eye that sees what's yet to come, its vision shall be fulfilled, unless blinded by events predetermined, thus light & shadows both be killed" He read out loud
[spoiler Effect] 3 Level 4 DARK Monsters Once per turn, during your Main Phase, you can Detach 1 Xyz Material from This card: When this card destroys a monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to Half of the ATK of the destroyed monster in the Graveyard & You gain Life Points equal to half of the ATK of the destroyed monster in the Graveyard