Equipment and fortifications can be attached to other permanents you control and have abilities that allow you to attach them, some even create a creature so you get a token to carry the tool
Professor Elm was the exact same thing as Professor Oak, a card that let you shuffle your hand and then draw seven new cards
Conversely, that Me moving from the graveyard to the battlefield would retain that counter if Humility ("All creatures lose all abilities and are 1/1") were on the battlefield
Attack 2 : United States of Smash Flip a coin
Current meta - How well the deck prepares you for competitive games, and whether it teaches you about newer mechanics
I would round out the broken list with Sol Ring, Library of Alexandria, Mana Vault, Mana Crypt, and Ancestral Recall