how can i invoke the spirits?

First 당신 need to prepare and sterelize your cicrle, spirits will not come unless 당신 show them the right respect, and nothing better than being clean. Light a white candle and walk the outer-ring of the 원, 동그라미 calling on the elements and if 당신 wish, light a stick of incence.
There are two ways 당신 can try, Ouija 또는 Scrying.

Ouija - if 당신 don't have a ouija board, 당신 can cut squares of paper, one for each letter of the alphabet, 1-10, and yes and no answers. Arrange them in a 원, 동그라미 and use a glass as the pointer. Then all 당신 have to do is ask if any spirits wish to make contact and go from there.

Scrying - sitting in front of a mirror 또는 a clear bowl of water. 당신 have to concentrate very hard for this as 당신 need to 'open' the mirror into the other world a bit like a doorway so the spirits are able to come through. Then all 당신 do is talk to the spirits through the water/mirror like an everyday conversation with another person. However 당신 need the atmposphere to be very quiet, so no ticking clocks 또는 buzzing of the computer, no background 음악 as these can all make your concentration waver and also make it 더 많이 difficult to hear the spirit.
당신 need any 더 많이 help 또는 step-by-step instructions just message me :)

What the heck does the word invoke mean? If u mean get rid of them seances, saige, rituals, and 더 많이 get rid of em.

Go watch Danny Phantom.

Spray some "Be Gone Spirit" spray.

Go to the cemetery and kick headstones and dance on plots.
That will certainly invoke them.
But I suggest 당신 don't do it.

Are 당신 insane?
This is so dangerous!
Please dont do it!
당신 can get a trauma! O_O

Laugh at them. Diss the dead. Preferably alone, in a dark room, and assuming 당신 own a Ouija Board, you're gonna die for sure.

I MEAN. Invoke some spirits.

Go out in the 거리 at night and yell, "YO, SPIRITS! I NEED Y'ALL! COME OVER HERE!".

With Google.

I'm not sure that's a good idea.
Good luck if 당신 do meet them and try not to anger them.

Go to a graveyard, and play 'Never Gonna Give 당신 Up' at 2:00 A.M. in the morning continuously. That will get them really pissed, causing them to come out from hiding. When they're out, spray deodorant in their eyes, while 노래 'Look At Me Now', and they'll get so mad, they'll commit suicide twice.

R u trying to call them
또는 get rid of them