For example, if you were casting Serra Angel, which costs, you could tap three basic lands of any type to pay plus two Plains to pay
Just to double down on your board wipes you round out your sorceries with Ruinous Ultimatum and Blasphemous Act, which go particularly well with Toralf, God of Fury on the field
It gives all other Humans +1/+1 while allowing you to use your creatures for removal so long as you have the mana to do so
When you prefer to deal in person, exploring local options can give you quick, immediate cash
However, Flail Around can do a fair amount of damage very quickly, so as long as you don't think you'll get knocked out by the defending Pokemon in one move I would suggest putting Hoppip in the active Pokemon spot and using Flail Around a turn or two, but you'll need to evolve Hoppip after that because it won't be able to last with such a low hp