mtg card api Premodernoracle.com is fixed (scryfall change broke it for a while), and now allows cycling through art options (saves the last-used in a cookie) : r/premodernMTG Flutter: Magic the Gathering Card

Commander, also known as EDH (short for Elder Dragon Highlanderthe original name of the format), is known for being more casual and enjoyable than some of the more intense formats, like modern or legacy

Not all online retailers seem to have stock though, so your ability to compare and contrast is going to be limited

Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Goblin Ringleader: If an effect refers to a [subtype] spell or [subtype] card, it refers only to a spell or card that has that subtype

You won't have a plan for the fifty variations of these popular decks that are out there