Beat Them Into the Ground
Warlord Attack 13
Melee weapon
Target: One creature
Attack: Strength vs. Fortitude
Hit: 2[W] + Strength Modifier damage, and the target falls prone. In addition, each ally within 5 squares of you can take a free action to make a basic attack. If that attack hits, the targets take no damage but falls prone.
Tactical Presence: Each ally gains a bonus to the attack roll equal to your Intelligence modifier. [PH:149]
Beat Them Into the Ground is a 13th level warlord encounter attack power introduced in the Player's handbook.
It is a good power selection, as it implements strong control over the battlefield by knocking targets prone.[1]