I laugh forever. Once the spell's infinite duration wears off, I realize that I could add another laugh after that, but decide instead to cry once.

I cast a spell called "supremum of all inifinities". (I don't know what this spell does; I just know that this spell somehow has something to do with a set that is bigger than every other set, including the set of its subsets.)

I receive a normally incomprehensible set of infinitely stacked infinities.

The only way I can think of to derive some sense from them: cast Time Warp infused with L'Hopital's Rule and a glyph of recursion.

(For reference: L'Hopital's rule is a principle in calculus for evaluating limits on the ratio of 2 "infinite" or approaching-zero functions)

After applying L'Hopital's rule an infinte number of times:
* There is a stack overflow, causing the universe to crash. (Not sure what that means, but that is what appears to have happen.)
* A fix is put into place, preventing the crash from occuring. Unfortunately, reality is messed up as a result of memory (?) corruption from the crash.
* The result of the calculation is now apparent; even after applying the rule enough, the result is still 0 divided by 0, which is indeterminate (or NaN in floating point terms).
* Of course, with reality being screwed up, it's unclear whether the spell, in this new messed-up, timeline, was ever cast, so it seems we may have an effect without a cause.

I cast Wish, and the wish I make is "I wish that this wish not be granted".

The Djinn that is summoned by the Wish spell doesn't like smart-asses and just kills you.

I cast 'Great Desire' on the next user. You now desire everything with DRM!

It just so happens that I had recently cast Bounce on myself, and it was still in effect. As a result, Lifthrasil's spell is bounced back, and Lithrasil now desires everything with DRM (Direct Rendering Manager), which pretty much means just the Linux kernel.

I cast Revive Self. (Who knew that such a spell existed?)

Casting a self-targeted spell into another person has weird effects... You are revived, but are turned into my Siamese sister.

I cast Forge's Redemption [major] into the next user. (I tried to cast in on myself but my new conjoined sister made me fumble...)

Fumbling Forge's Redemption (major) instead forges the Redemption legendary rocket launcher from Borderlands (see https://www.google.com/search?q=borderlands+legendary+item+redemption&ie=utf-8&oe=utf-8&client=firefox-b-1) for the next person. This item is a reference to the Redeemer (nuke launcher) from Unreal Tournament. Due to the (major) affix, the Redemption is rigged to launch nuke-rockets.

To mitigate this, I present the next user with the Ritual of the Void from Might and Magic 6, which can fully contain a blast that would otherwise smash a planet.

Unfortunately, the topic says to cast the spell "on the next user", and as a result, it's cast on me rather than at the nuclear rockets. As a result, the spell doesn't affect me (wrong type of target), and the nukes explode anyway.

Once the dust settles...

I hurl an IUD at the next user. (Was going to be an IED, but something got mixed up and the middle letter got changed.)

Thanks! Shortly after your spell I was attacked by many evil dick wizards casting river of semen spells. It was absolutely disgusting, but your magic created a protective barrier and I managed to avoid the worst of their magic and escape.

Because I'm not disgusting I cast river of sea men.

And, though I intended 'men' to be gender neutral, realistically it isn't, so I favour clarity over wordplay and recast it as river of sea people.

Well, it seems that even your clarified spell is not that clear, and it was interpreted as "river of see people"; a river forms in which you can see many people.

A bit later, you go blind, except that you can still see the people in the river. Fortunately, the blindness is only temporary, but during that time things are definitely rather weird.

I cast the Save Warp spell.

Well, dang, that Save Warp spell was super-handy! It warped all my save game files to my new laptop, so I didn't get stuck searching a bajillion different places to find all of them. Big thanks!

With all of that effort eliminated, I had time to develop and cast the spell "Flubber".

UK version: This flying rubber makes charcoal sketching easy and fun! I become a master of fine art in a few weeks and sell many beautiful portraits.

US version: These flying rubbers neatly restrain those pesky dick wizards, and now I am liberated. I devote my new-found freedom to the arts.

Cast: Frisky Business

Frisky Business has transformed my company! Instead of providing automation support, I now run a mall kiosk selling laser pointers and balls of yarn to owners of kittens. I have taken to heart one important lesson learned from Steve Martin: don't take returns if the toys have cat spit on them.

While attempting to train kittens to obey basic commands, my spell Magic Whistle didn't have the effect I was expecting...

You cast Magic Whistle, and suddenly a group of monsters attacks.

You now have to face:
99 Malboros (can inflect most status effects on multiple targets at once with their breath attacks)
99 Blizzards (have multi-target instant death)
99 Red Dragons (have breath attacks)
99 Metal King Slimes (which *all* run away on the first round, of course)

I cast Summon Metal King Slime, and direct it to attack the next user.

It then immediately runs away, leaving me to wonder what was the point.

I cast Magic 8-Ball to try to understand, but the ball slips out of my fingers and rolls down to the next poster.