However, assuming that you're building a fairly typical deck, there is a really simple way of figuring out about how many lands you should put in your deck
Water-Type Pokmon This is a balanced type, super effective against three (Fire, Ground, and Rock) while taking super effective damage only against two (Electric and Grass), on top of having four resist types
Regardless, Mewtwo EX defined the TCG's meta when it was top of the pile, and has become something of the poster boy for the best Pokmon cards
Lastly on the middling cards list is Tax Collector, a mix between Tithe Taker and Azorius Arrester, offering a choice between the two effects
The Vanish mechanic simply is no replacement for the Madam Mim Bounce package that makes up the heart of every Amethyst deck out there