I had an echantment like that put on the staff of my favourite character. I may or may not have killed nine wizards due to the power of getting three ninth levels spells on it. I may or may not have killed the rest in making a +80 large greatsword to sell to a ridiculously rich frost giant chieftain to get myself a pair of iron colossus and lichify myself. I had Time Stop, Imprison and Mordenkainen’s Disjunction on the staff.
I also once used a Chain Lightning spell to kill an entire Aboleth city; it was underwater, and made of conductive metal, so the lightning just kept arcing through stuff, eventually killing the entire city.
Another funny story is, when very drunk, my character decided to cast buffer spell on the party. Now, since I’m a super elitist drow Wizard,nobody can tell I’m drunk off my ass. I accidentally cast delayed blast fireball, and so when nothing happens, I cast the spell again. However, since my drunk character’s memorized the wrong thing in his spellbook, I do this three more times, until the party Paladin, who I (being Nuetral Evil bordering on Chaotic) didn’t like, stepped forward and was literally completely destroyed. His bastard sword was okay, but his armour, even, was disintegrated. Our elven ranger and cleric also died, making me a happy little drow. Only the halfling rogue, (stupid improved evasion), Gnoll fighter, and I survived. We were all evil, so then we went on a killing spree until the other people had their character sheets done.