Harry Potter: Quidditch Champions

The Knock on Wood achievement can be obtained at any time, even during the tutorial matches, once you have unlocked the Beater role. You need to switch to the Beater role by pressing Down on the D-Pad and selecting “Beater”. Summon a Bludger to you by pressing Left Bumper, and fly near to the opposing Keeper (goal tender) when one of your Chasers has the Quaffle and is going for a goal. Press while looking at the Keeper to hit your Bludger at them, and stun them temporarily. If your team’s Chasers score shortly after you stun the Keeper, then the Achievement will unlock! I hope this helps!