Knockdown (abbreviated as KD) occurs when using a certain attack that knocks down or when a certain amount of attacks has been reached. The reason this exists is to prevent infinite combos. It's best to not knockdown a monster/opponent since this leads to reduced damage while the enemy is on the ground (in PvE) or a combo ending (in PvP).
Conditions
The target will automatically knockdown when:
A knockdown attack has been used
Any hit after the knockdown counter has been reached:
PVP = 100 Max KD
PVE = 130 Max KD
Knockdown counter will reset after a knockdown from maxing the KD counter
If the Knockdown counter is breached while in mid-air, the target will fall more quickly.
Reducing Knockdown
Certain characters have skill or attacks that can reduce the knockdown counter
Most attacks that knockdown when used against targets in mid-air will reduce KD
Legend
Name
Description
Launch Attack
LA
Launch opponent vertically into the air (High chance of continuing combo)
LA1
Launch opponent horizontally left either/or right
LA2
Launch opponent horizontally left either/or right into the air
LA3
Launch opponent diagonally into the air or ground(High chance of continuing combo)
Pass
P
An attack that will move you through your opponent (High chance of continuing combo)