Ive used Draco, Ive used Emrakul, the Promised End, Ive even used Blinkmoth Infusion
Completing a master set often requires collecting every Reverse Holo, which boosts their desirability
However, the part thats causing some mixed opinions is the text in the lower right corner of the card: Mega Evolution ex rule: When your Mega Evolved Pokmon ex is Knocked Out, your opponent gets 3 points. The rule mirrors the one found on cards in the main Pokmon TCG game
We still have booster boxes available of both Mega Brave and Mega Symphonia, as well as the Pokmon TCG Mega Premium Trainer Box, an ETB-style product including booster packs from both sets
Around 10 Energy cards to power up your Pokmon
They expect other people to clean up HP/MP copies of the card in a panic, truly completing the buyout without having to spend money on the less collectible copies of the card