In basic terms, Greninja Ex is the must-have card in this deck, and the rest of your cards are there to get it into play and then back it up once it's on board
Chaos: Whenever you roll Chaos, create an 8/8 blue Octopus creature token
Proper storage is non-negotiable to protect them from dust, humidity, and physical damage
The Fertile Lands of Saulvinia Plane Antausia Whenever a player taps a land for mana, that player adds one mana of any type that land produced
Every Card In Mythical Island Mew Pack As soon as you head to open up a pack, the highlighted cards you see include Vaporeon, Mew ex, Aerodactyl ex, Serperior (one star), Pidgeot ex (two stars), and Blue (two stars)
Getting the Lesson creature later on also matters a lot less when you get an immediate benefit from attacking with something