So, let's start there: Top 10 Non-Creature, Non-Land Permanent Repeatable Loot Effects For Hashaton or Captain Howler Mask of MemoryMask of Memory Daretti, Scrap SavantDaretti, Scrap Savant Teferi, Master of TimeTeferi, Master of Time Key to the CityKey to the City Hazoret's MonumentHazoret's Monument Collector's VaultCollector's Vault Smuggler's CopterSmuggler's Copter Shorikai, Genesis EngineShorikai, Genesis Engine Mirrodin BesiegedMirrodin Besieged Chivalric AllianceChivalric Alliance While that's not the deepest pool of good options I've ever seen, there are still some options here
It adds the following: Wishes - a cycle of cards that allow the player to bring in cards that they own from outside the game
If Vedalken Squirrel-Whacker's base power or toughness changes through some other means, it is possible to exchange a die roll so that it has a result that would normally not be possible for that die, such as, on a six-sided die, a result of 9, or 42, or -3
Many are updated older cards that've been errata'd in the Grand Creature Type Update of 2007
Trelasarra, Moon Dancer is one of the newer Life-gain commanders, and shes one of the most fun
