what mtg packs have serialized cards Are Serialized Magic Cards Worth It? The Problem With Serialized Magic

He simply says that Magic: The Gathering is currently making a "conscious effort to prioritize having more cards with flavor text", so there's no need to worry about that particular aspect of cards going anywhere soon

The only times that they have been are during Gavin Verheys special Draft Events and Mystery Boosters

At that point, Shifting Woodland can become a copy of Aftermath Analyst, allowing you to sacrifice and reanimate it and generate infinite mana and eventually infinite Mirrorpool and Hanweir Battlements activations to produce a horde of hasty attackers

I walked over and grabbed one of the playtest decks

They offer strong synergies, unique mechanics, and high upgrade potential