So you actually seen other realms and magic exists?
I have seen two realms/dimensions very briefly.
And magic can work only when all the conditions are right.
Even the best magicians fail most of times.
However, in a long run, magic is always bad for the practitioner because it tends to increase the delusion of magician.
Magic binds people closer to Samsara.
Dhamma leads people beyond Samsara.
So Dhamma is trillion times more beneficial than magic ever was or ever will be.
So what is this magic, what could you do?
Magic contains many different types of workings.
I tried many types and most of workings (more than 90%, I say), I failed.
Also I had wide interest in various dimensions but whenever I tried channeling to the other side, mostly I failed. (I only had glimpsed two realms/dimensions briefly in my life)
However, one particular practice that was working well for me was Tarot reading.
At my best, I had 90%+ accuracy for a couple of months.
Some of the reading were very very detailed and thorough.
The really funny thing is when I developed dependency of relying on Tarot reading, things started going south.
Also I found out that it's not just me but all the others had similar problem.
When someone starts magic, sooner or later, he or she will find out one or two workings he or she is particularily good at.
But when he or she develops dependency, it always goes south and stops working.
Don't ask me why because I am just reporting what I observed.
In a way, it is very similar with drug addiction because at first, drug seems to be cool but when you develop dependency, everything goes south.
And the most dangerous magic is channeling because it develops very strong attachment to particular realm.
Anyway, it's the best to stay away from them altogether.