buy unopened pokemon cards TCG: Authentic Factory Sealed Booster Pack (Includes Mystery Card Bundle - V/VMAX 1 in 3 1 Sealed Pokmon Booster Pack From a recent Pokmon TCG set The Best Sealed Pokémon TCG

Keep tabs on local game shops and events in your area to learn when you can obtain one of these limited cards

One example below is from the 2008 Magic Championships, and the other is from playing in a Grand Prix in 2018

A drop that includes three board wipes in Day of Judgment, Star of Extinction, and Toxic Deluge would already be frightening, but adding in an extra turn spell in Temporal Extortion, and a way to exile key cards from your opponents' decks with Praetor's Grasp makes this by far the meanest Secret Lair drop we've ever seen

This is already how it works for double-faced cards, so it makes sense for the same rules to apply here