RD/KP06-JP018 スピーディー・パフォーマー Speedi Performer (or Speedy Performer)
Level 3 DARK Psychic-Type Effect Monster
ATK 400
DEF 1000
[Requirement] If your opponent controls a monster, you can activate this by sending the top card of your Deck to the Graveyard.
[Effect] Choose 1 face-up monster you control, it gains 400 ATK until the end of the turn.

Source