Lim-Dul's Vault has a very primitive version of what would become the 'Scry' mechanic, but with a whole lot of extra unnecessary steps
In general, both are used as banish fodder for Hiram and Belle Apprentice Inventor
which can shut down an attacker for one turn, Runestone Caverns, which will provide some card advantage, and the final room, Mad Wizards Lair, which draws you three cards and allows you to cast one for free
So if you want to build a collection thatll gain value over time, here are some options for you
This will automagically create a ton of magecraft triggers, so I think rather than going crazy with big haymakers, just copy lightning bolt 3 times and get 3 triggers, and that's better
If Rest in Peace is destroyed by a spell, Rest in Peace will be exiled and then the spell will be put into its owner's graveyard