At the start of the Damage Step, when this card battles a Special Summoned monster: You can make this card's ATK becomes double its original ATK, until the end of the Damage Step. Once per turn, during the End Phase, if this Synchro Summoned card is in the Graveyard because it was sent there this turn: You can target 1 "Speedroid" monster in your Graveyard, except "Hi-Speedroid Puzzle"; add it to your hand.
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