Mew is fairly modest, hitting for 20 and revealing the opponents hand, but Mew ex has a Ditto-like ability to mimic any attack of your opponents active card, and for three Normal energy, meaning it can be used in any deck of any stripe
Filters (All by default) Explore Speed Duel GX: Duel Academy Box rankings Top 25 best cards in Speed Duel GX: Duel Academy Box #1 Speed Duel GX: Duel Academy Box Speed Duel GX: Duel Academy Box Unknown 30d -0.1% 0.2/dayStrong Vol - $24.91 6 sold (30d) #2 Destiny HERO - Plasma (Secret Rare) Speed Duel GX: Duel Academy Box Secret Rare #SGX1-ENB01 1st Edition 30d +4.0% 0.1/dayStrong Vol - $4.42 3 sold (30d) #3 Dekoichi the Battlechanted Locomotive (Secret Rare) Speed Duel GX: Duel Academy Box Secret Rare #SGX1-END05 1st Edition 30d 0.0% 0.1/dayStrong Vol - $3.32 3 sold (30d) #4 D.D
Contractual Boss Immunity: Bosses are generally immune to the game's "Status Abnormalities", Status Effects that don't have a square icon and don't stack with each other
Aside from that win condition, its regular attacks provided the heavy-hitting versatility needed to trade blows with other massive GX threats
Their ultimate is where things get really silly though
You can stick with Edgar Markov and build an aggressive Vampire deck by adding more lords, Shared Animosity, and other aggressive tribal-matters cards, or you can go with Licia, Sanguine Tribune and build lifegain combo with Sanguine Bond, Exquisite Blood, Defiant Bloodlord, and the like