Zamorak - Drains 60 percent of OSRS gold the bar when used. Ice Barrage spell is capable of doing anything, including freezing you halfway through. Used to be the cheapest and most useless hilt, but then people started ranging Zilyana (Saradomin's general down the GWD) and realized it's much more comfortable than the old magicks.
I love the idea behind the idea of cheap RuneScape gold having trophies at home, and am currently trying for a Bass trophy. I have questions about the time it takes to catch the bass necessary to earn the trophy. It could look different. Do you need to cook it in order to mount it? I think the amount of time needed to get it will differ among people.