Sometimes thats going to be a change to the traditional MTG mana colours
The deck is exceptionally heavy on removal spells, with Archfiend of DepravityArchfiend of Depravity, Deadly TempestDeadly Tempest, Blasphemous ActBlasphemous Act, and Reign of the PitReign of the Pit to name just a few
You dont gain much life each time, but Karlov cares about the number of times you tithe, not the overall value
Instead of aiming for raw power and crushing your group as fast as possible, this list will help you pick out a commander that fits the spirit of Halloween
All this is to say, while people with big Reserved List collections will lose some value if the foil loophole is reinstated on the Gaea's Cradles and Gilded Drakes of the world, the impact is likely overblown, as the most expensive cards on the Reserved List are expensive because they are extremely rare and collectible, not because they haven't been reprinted