ive eaten the magic ones a few times and i can warn anybody else who does em, do not look into the mirror!

do magic ones grow near poisonous ones?

You cannot, should not, just look at the tops, many look similar but are in no way equally safe. The substrate they grow on & the look of the underside, the spores, etc etc are vital.
My books recommend not eating any mushroom unless you can confirm 3 points of identity with certainty!
Now, most poisonous mushrooms only give you more-or-less severe digestive upset. But a few dissolve your liver. Once ingested, there is no hope.

This looks like the shaggy inkcap. Coprinus comatus. Sometimes called Judges wig. They are commoin in England and look similar to your picture but Australian mushrooms may not be the same as ours. Does it have a pouch with young mushrooms in it? They are edible and quite tasty. They are called inkcaps because the spores are released in a very black ink after a few days. I have been told not to drink much alcohol if you are eating these because it can cause you to be sick. I have eaten them without drinking much and they are fine.

Checkout pictures of Coprinus comatus with google to make sure it is the same species.

Only if you eat them. All mushrooms are poisonous to some degree.