Ghost Knight of Jackal
Attrib: Earth
Type: Beast-Warrior/Effect
Level:5
Atk: 1700
Def: 1600
You can Special Summon an opponent's monster that is destroyed and sent to the Graveyard by this card as a result of battle to your side of the field in face-up Defense Position.


right so if i happen to have a banisher of light on the field can i still summon the monster before it goes out of play or is banisher of light faster?


Banisher of the Light
Attrib: Light
Type: Fairy/Effect
Level:3
Atk: 100
Def: 2000
As long as this card remains face-up on the field, any card sent to the Graveyard is removed from play.

From what I can tell, the destroyed Monster never hits the Graveyard since Banisher is face-up on the Field. Remember, Banisher's Effect is a Continuous Effect.

*Waits for others*

You are correct, Joker.

The monster must actually be destroyed and sent to the Graveyard for its effect to be applied as the ruling from UDE and Netrep state...

""Ghost Knight of Jackal"'s effect activates when you send a monster to the Graveyard."