Ancestral Recall is just off the charts, and like Library of Alexandria, it's banned everywhere save Vintage, where you can have just a single copy in your deck
It involves copying your creatures and using energy counters to let them stick around (or, in some cases, letting them die to take advantage of death triggers)
Heartless Summoning Pairing Heartless Summoning with oversized creatures like Elder Gargaroth and Myr Superion is the easiest way to break the card, but why not put the -1/-1 ability to work
Specialty titles, such as instant-win games and crash-style experiences, round out the catalog for players seeking fast sessions with transparent odds and simple rules
And others use the oil counters like the fading mechanic so the card comes with counters but you need to take one off every turn, like Evolved Spinoderm
The first sentence is simple