How to Make The Most Out Of Flashback Flashback is a useful thing to have in almost any deck because it provides you with something inherently useful: value
From there, it's just a matter of deciding which route to go, as death triggers, for example, can be used to drain your opponents with the likes of Blood Artist
It's a desert that enter tapped (booo!), taps for any color of mana a land you control could produce, and by paying 3 mana, it becomes an X/X Plant creature with reach until end of turn, where X is the highest mana value among your Commanders
Belo Betty sweet spot: you can quickly put a lot of pressure with the leader effect, triggering all characters' conditions like the free summoning from Ivankov4 or the Karasu stat reduction (letting you hit 8k on 4k opponent leader
Given the Eldrazi cards in this set, these look very important and well designed for the format