Planeswalkers as well as dorks
Theres no new card types or sub-types
A creature you control is considered modified if it has at least one counter on it, if it's equipped, or if it's enchanted by an Aura you control
Contents: one (1) foil oversized Commander card, one hundred (100) card deck, ten (10) double-sided tokens, one (1) deck box, one (1) Life Wheel, one (1) punchout keyword counter card
Playing Magic can be expensive, so you could accidentally waste a lot of money buying cards only to discover they dont do what you wanted if youre trying to brew a new Commander or Modern deck
One tricky rules interaction involves copying bestow cards that are enchanting another creature, perhaps with an effect like the one on Three Dog, Galaxy News DJ