Alchemist's Refuge does not yield specific types of mana, but it does allow you to add the flash ability during gameplay
Pre-constructed deck: 51 cards (17 types in total), Don
Due to the presence of equip costs, activated abilities, and Pack Guardians optional token generation, Ive found that the standard(ish) count of 24 lands works best, though I might consider lowering to 23 if I found a new card that really suits the deck
You won't be able to test this when purchasing cards online, as pictures sellers take of cards rarely will have the resolution to let you zoom in close enough and clear enough to see the red 'L'
Many people imagine this kind of deck when they hear Lower-Power Commander, and I think that assuming games will end up like this is just wrong
Obscura Interceptor offers something a little more than that, though, because it can connive