"Dash toward your opponent to inflict damage. Lowers opponents Mobility Gauge recovery upon impact. Temporarily lock opponent's Mobility Gauge if it hits while powered up"
Kingstrike (王の一撃 - Ō no Ichigeki, lit. Hit of the King) is one of the abilities exclusive to Meruem in Jump Force.
Overview
Meruem rushes forward to claw his opponent, then flips over them, which causes a hard knockdown.
If it connects, the opponent's Mobility Gauge recovery is stunted for 15 seconds; if used after a successful I Am Hungry, it completely locks their Mobility Gauge for 10 seconds.
Kingstrike in action