While you'll still have to spend a small fortune on those rare Pokmon cards from older, out-of-print expansions, there are regular Pokmon TCG expansions dropping every couple of months
Cast it on turn one, activate on turn two and swing for two damage with our 2/2, then activate it on turn three and swing with a 4/4, and on turn six you can turn it into a nightmare for anyone, although you may not get that far
In a focused strategy that creates and sacrifices artifact tokens, Biotech Specialist can deal a ton of damage with little effort
Trailtracker Scout looks to change that up with a neat little expend ability
Karador, Ghost Chieftain The good news about Karador is that he is a little easier to stop than others because you can aim hate at the graveyard to slow him down
Cards like Horizon Stone, Sword of the Animist & Bitterthorn, Nissa's Animus could also be helpful