>What is IRC?
IRC is a cool-kid chat protocol widely used by cyber criminals, you can connect through Tor Browser or with your own client.

>Where is the link?
You can enter dnmirc4ammtmfnwtgomctcl7gdtwrkp2ymkzw6y6xelo5rqaqm3peiid.onion into Tor Browser and you will be presented with a chat client, choose a username or use the given one and click connect.
The same URL can also be used to connect with any IRC client with port 6667

The main channel is #hiroshima

>How safe is this?
You should never assume any server is safe, but IRC has stood the test of time, first being introduced in 1988, before HTTP!
Although this, anything is possible. Just as you should never say anything that can compromise your OPSEC on Dread, the same rules apply in IRC too.
For encrypted messages, you can install OTR encryption plugin and nothing can be intercepted.

Also, don't be a fucking idiot and get scammed. Following links and sending someone $$$ for an item whatever it may be, is 100% your responsibility.

>How is this different than any other IRC server?