The easiest way to think of it is this: if you know you always want to see at least one copy of a particular creature or spell (or anything else) each game, then you want four of it
Its very important to make your first five land drops, which 23 is a little light for, but with eight one- and two-mana cantrips and four cards that search for lands, it felt about right
Writing these scripts
Where does he find them
Swampert's only move is entitled Hammer Arm and this move requires four energy cards, two each of water and colorless and does 80 damage, besides doing the damage you also get to discard the top card of your opponent's deck
With that in mind, we use, as removals, Beast Within, Assassin's Trophy, Chaos Warp and Rakdos Charm, which also have other very efficient functionalities and can be a great help