If I use [BT15-052 Puppetmon], [BT15-066 Machinedramon], or [BT15-079 Piedmon]'s [End of Opponent’s Turn] effect to play this card from my hand, does this card's [End of Opponent’s Turn] effect activate?
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Official Ruling
No, it doesn’t activate. It won't activate because the trigger timing for this card's [End of Opponent’s Turn] effect has already passed when [BT15-052 Puppetmon], [BT15-066 Machinedramon], or [BT15-079 Piedmon]'s [End of Opponent’s Turn] effect is used to play this card, so it won't trigger until the end of your opponent's next turn.