Delterius
Arcane
Don't call it the Deck of Many Things. That sounds too wonderful. Call it the Cursed Set of Ironic Misfortune. Maybe then the little shits will be slightly more respectful of the powers that be (yours).
Early versions of the game *did* have a lot of stuff simulated like this. They were taken out due to hardware limitations. PM me I can send you the source code.The Ultima series intentionally included spells that were cool but functionally useless, such as this one: http://wiki.ultimacodex.com/wiki/Eclipse
Not to mention the famous Armaggedon: http://wiki.ultimacodex.com/wiki/Armageddon
But I guess that's not quite the same thing.
If a little more work had been done with NPC schedules, and if the game had relied on them a bit more, some of the useless spells could have been very interesting. Like the rain spell in Ultima 7 or even the fireworks spell. The magic lock spell too was pretty useless, though it didn't need to be so. If the game calculated safe/unsafe areas dynamically, or if the NPC schedules were actually simulated, it could have been a pretty cool spell.
And just for a moment let's recognize that we're griping about games that came out in 1999. (Ultima IX and Heroes of Might and Magic III were both released that year.) That was 18 years ago. We hold some long grudges.