Forum:Ninjitsu Art of Super-Transformation vs white knight dragon

I'm pretty sure that this doesn't work but it never hurts to ask. If I use Ninjitsu Art of Super-Transformation to special summon white knight dragon from my deck, can I negate the ninjitsu art if its removal effect activates? I'm pretty sure he can't because the ninjitsu art is already face up on the field and it would be treated as a continuous effect, but i'm not sure if the removal effect is treated as a trigger effect.