Turbo Warrior (DP08-EN015) - Duelist Pack 8: Yusei Fudo Unlimited

Turbo Synchron + 1 or more non-Tuner monsters // When this card attacks a Level 6 or higher Synchro Monster, halve the monster's ATK until the end of the Damage Step. This card cannot be targeted by the effects of Level 6 or lower monsters.