If an ability changes a cards creature types then it doesnt modify any land types, artifact types, or whatever else the card might have
Environmental Scientist I first first really cut my teeth as a Magic player during Ravnica draft
A: A repeatable ability, deep card pool, clear win condition, and consistency tools
Thundertrap Trainer is a fantastic way of filtering the top cards of your deck for the cards you need
in that it has its own anime series with parallels to its own gameplay, which consists of summoning units to attack/defend against your opponent
There is interest in commander and standard formats, as well as, historic and pioneer