Question about Vixen's Entrapment

It says it will trigger a socketed curse spell after i cast another curse spell with a 0.25 cd. Lets say i socket 4 curse spell gems in it, will it trigger all 4 curses at the same time or will it trigger them one by one every 0.25 seconds?

If thats the case is there any way to apply multiple curses instantly?.

Vixen's Entrapment will trigger every socketed Curse when you cast a Curse spell, which very short delay between each one.

https://www.youtube.com/watch?v=MwPPryE0Xnk

Not sure if they are exactly the same time, but definitely much less than 0.25 secs between one another. From the video above, they are seen to be triggered at the same time.

It casts them all at once, and then the cooldown occurs.