Aesthetic appeal: Let the sleeves be an extension of your personality
Graded Population Report: Umbreon ex #161 Visualize the distrbution of grades in the chart
Salvation Colossus wants to be milled, which isnt always easy in energy decks, while Liberty Prime, Recharged is a potential Jeskai commander if you just like big giant robots a lot
"Tearlaments Rulkallos" is a notable exception of these themes, as she is "Tearlaments Kitkallos" that was freed from the brainwashing effect of "Reinoheart" and thus lacking the padlocks that the other "mermaid girls" have
So, if a spell lets you search your library for a land card, you couldn't find Treasure Map, but if you're searching your library for an artifact card, you could
Getting from being someone that knows nothing about the game to being able to play your first game of Magic with confidence is a pretty big gap