And there are tons of places that you can go
Standard Ranked puts you on the competitive ladder, using only the cards available in the Standard format at the moment, but if you have more cards from previous sets, choose Historic Ranked to have the freedom to use all the cards you want
The shaves to the typical manabase likely form some combination of Ancient Ziggurat or Unclaimed Territory for a Sunbaked Canyon, and possibly the Island for the Waterlogged Grove, but I will need to go into the lab to figure out the right formula
(It can't be blocked except by creatures with flying or reach.) Tap target creature
There are a lot of useful Rats you want to stick on the battlefield, and Swarmyard helps make your opponents require two removal spells if they ever want to take care of a Rat
Plus, 7 mana for a decent colorless board wipe isnt even that expensive, especially as there arent any color requirements here