If you don't like decks that draw a lot of hate, then I sadly would caution against picking this one up :( The Precon List Before we talk upgrades, let's take a look at the stock list to see what we're working with: Corrupting Influence is focused solely on Poison counters, an archetype with a rather shallow card pool, but still cobbles together enough of them for a focused deck: I count 40 cards that are on-theme, either with toxic (Blightbelly Rat), infect (Blight Mamba), gives poison counters (Vraska's Fall), proliferates (Contagion Clasp), or benefits from poison some way (Geth's Summons)
Black Bolt Evolve first partner Snivy all the way to Serperior ex, and discover the inspiring power of ideals with the regions Legendary and Mythical Pokmon, including Zekrom ex and Meloetta ex
Yes, Pocket is a free-to-play game
This means you wont have to worry about any traps affecting your plays
Singleton format means you can't build super consistent strategies