S8s pull-rate math is less forgiving than S8A or S9 (which have more distributed value), but the ceiling is higher if you hit Mew VMAX SA
[226] They later released an expansion Battle for Zendikar featuring multi-color Planeswalkers Kiora and Ob Nixilis and a colorless Eldrazi Ruiner, and a second master set Shadows Over Innistrad which has 4 new Planeswalkers and also includes the addition of cryptoliths

Crow Skull Meister Effect Veiler Kuriboh Sphere Kuriboh Rainbow Kuriboh Gemini Imps Honest Dark Honest Nibiru, the Primal Entity Ghost Belle & Haunted Mansion Ghost Sister & Spooky Dogwood Ghost Mourner & Moonlit Chill Ghost Reaper & Winter Cherries Ghost Ogre & Snow Rabbit Flying C Retaliating C Maxx C Contact C Gnomaterial Bystial Baldrake Bystial Druiswurm Bystial Saronir Bystial Magnamhut Mulcharmy Fuwalos Mulcharmy Purulia Chaos Hunter Battle Fader Swift Scarecrow Artifact Lancea Gorz the Emissary of Darkness PSY-Framegear Delta PSY-Framegear Gamma Goddess of Sweet Revenge Lifeforce Harmonizer Tearlaments Kashitra Abominable Unchained Soul Gravekeepers Watcher Arcana Force XIV Temperance Dominus Purge Dominus Impulse Infinite Impermanence
You can use them as walls to protect your Life Points or as material for Extra Deck Summons
Each creature comes with an attack and defense rating in the bottom right corner, which signals how powerful the creature is, along with additional abilities listed on the card
So overall, Mega Manectric EX is a situational star, and the fact that losing it is lights out, you are better off relying on other options