Alongside this, thanks to plenty of eternal legal fixing and fast mana, their cost isnt too problematic
The second ability is a bit less frequently used, but its a great protection skill that allows you to evade a removal spell that intends to destroy one of your creatures with any sort of damage, be it targeted or a universal board wipe in MTG like Blasphemous Act
While that's rarely what you'd want to be doing in an ideal scenario, flashback can be invaluable when things aren't going to plan
At 4 mana, its going to be an integral part of your deck, often coming down on turns 3-4, and it provides a lot of value
Collector Boosters are much more expensive than Play Boosters
Some of the cards where not just removed they were outright replaced