Since Red regularly casts from the exiling of the top cards of their library as their card flow, that's very strong there
For a time, sets and cards that were readily available quickly became difficult to find
Levels: Some spells will have effects that change across three different levels depending on the amount of mana paid, indicated by the new keyword Levels. Flashback: The Flashback mechanic returns, this time appearing in a cycle of Towns. Land Cycling: Convenient abilities like land cycling, island cycling, and swamp cycling, which allow players to search their library for specific land types, will also be included
(I will point out that the idea of bringing back all the old mechanics at once was innovative, but once again, that is execution not content.) During Tempest design, we came up with a series of cards that you could choose, if they were in your library, to draw one less card and put them into your opening hand(don't ask how this would work in the ruleswe never got that far)