Post cool things here, I guess.
Dark Magix that no longer work ("Unmagixed") should be struck-through, but remain on the list with a note about the time and circumstances in which they ceased to function. Dark Magix that Should Not Be Used should be italicized, but remain on the list with a note about why they Should Not Be Used. Also, don't use those ones. I trust you, because you probably aren't this deep in the wiki unless you love the game, and Dark Magix that Should Not Be Used are typically marked Should Not Be Used because they harm the game in some way.
In the past, we had this thing called "Radio Banter" (it will return in Season 32)). That's not really important. What is important is that there are two urls, http://www.improbableisland.com/dual.html and http://www.improbableisland.com/dual_side.html, which can display two frames of the Island at the same time (using the same log-in session, however). Neat, but useless.
As you know, any character who knows timed fighting can teach it to another character using the "teach this character timed fighting" link on the other character's biography page. However, did you know that that button just puts the argument "op=teachtimedcombat" in the url? You can use that string on any character3) to teach them timed fighting, even if you don't know timed fighting yourself. This method ignores the restriction of teaching one person per day. Yes, this means a character can teach himself timed fighting.4)(Unmagixed since about October 2012: The "each one teach one" method of learning timed fighting was replaced with an NPC one learns timed fighting from.)
You know how CMJ used to use the Enquirer as a blog? It's technically possible for anyone to submit a blog post for approval by appending the string "submit.php" to "http://enquirer.improbableisland.com"5)(SNBU: No one has actually told me not to use this feature, but since your post will probably never be approved, it'll just go into a queue somewhere and maybe annoy an admin or moderator some day. Likely a waste of everyone's time, but kinda neat to know about!)
Everyone knows that typing http://www.improbableisland.com/bio.php?char= followed by a player's number will take you to that player's Character Biography, but did you know you can type in a name instead of a number? True fact.
One can create a character whose name is blank or entirely whitespace6)7) (again, see http://www.improbableisland.com/bio.php?char=) and this character will basically be able to do special comments for free, as when she emotes she has a blank slate to write on. For example, if Full Metal Lion typed ":The trees look happy" into chat, it would display in chat as "Full Metal LionThe trees look happy". If the character with the blank name typed the same thing, it would display as simply "The trees look happy".(SNBU: Sessine pointed out that this is basically cheating the system to get items which should cost SP and fund the game.)(Unmagixed a while ago: Full Metal Lion created a character using this technique and had a little fun with it. Then Sessine changed her name to "Spaces" and the account eventually timed out8). Later Omega created another character using the same technique, and still keeps her active to this very day. As a result, no other character can be created using this technique, as two characters can not have exactly the same name, and Spaces' name is still an empty string as far as the system is concerned.)
Check out this thread, particularly this post for some neat dark magix, some of which still work.