Playing an extra land ramps you, and these decks usually have high land counts
One-Mana Cantrips I prefer Tidings and Concentrate, but these are pretty commonly played
Timetwister It might look like this is pretty far down the list for part of the Power 9, but there are some significant drawbacks to Timetwister
It's slow value for sure, but that's a lot of value across the whole game, and let's face it, removing this thing feels like a waste so very few people will actually do it
Finally, for the first time ever, a Commander release will have Collector Boosters with special treatments for cards found in the decks
Rarity and Balance Shifting our attention to the factors of rarity and balance, its important to note that a cards rarity (common, uncommon, rare or mythic rare) determines how difficult it is to obtain from booster packs