Mind HammerSorcerer Attack 13
Howling chaos slams into your foe's mind and throws the creature to the ground.
Encounter ✦ Arcane, Implement, Psychic
Standard Action Ranged 10
Target: One creature
Attack: Charisma vs. Will
Hit: 2d10 + Charisma modifier psychic damage, and you knock the target prone.
Wild Magic: If you rolled an even number on the attack roll, the target can't stand up until the end of your next turn. If you rolled an odd number on the attack roll, you slide the target a number of squares equal to your Dexterity modifier.
Published in Player's Handbook 2, page(s) 143.