Like every Pokmon team needs Pokmon, every deck needs at least one Basic Pokmon to be legal, and the fun is how you use your 60-card 'team' to win the game
Then you can get them to arrive bigger with a +1/+1 counter and then you can spend two Gruul mana when a 4-power dork arrives to have Slinza fight them
Commander decks These are also precons
Mox Pearl was fourth because of Balance and sometimes Swords to Plowshares, leaving the Mox Emerald for last
Caustic Caterpillar, Seal of Primordium, and Outland Liberator are all great, but give me Thrashing Brontodon any day
Its availability is limited by distribution rather than pack-pulls, meaning collectors often need to search harder to add this piece to their Surging Sparks lineup