They cost mana to use, which means you're setting yourself backward in resources just to get a single color
Tapping Rings for four or more draws per turn means we can even run card- disadvantageous spells like Solitude, or March of Otherworldly Light without undermining our main plan
At the time of writing, the max level is 50, but expect that to expand in the future
Below is a table for a better example: Rankings and Tiers for Constructed: Rankings and Tiers for Limited: For the Mythic Rank, reached after Diamond 1, we will talk later, as it is the highest rank and deserves greater attention to explain it
Some might be revived when new sets revisit the same plane or theme, or appear in supplemental products which arent limited to a narrow mechanical palette
Card prices are up 1119.3% all time, up 5.3% over 30 days, and up 10.8% year-to-date