Equipment, as we know it, first appeared in the Mirrodin set, and it's been a staple of the game ever since
Caustic Bronco Perhaps my favorite creature in Standard, Caustic Bronco is an aggressive spin on Dark Confidant thats a wonderful threat for black midrange and aggressive decks because its a great source of early pressure while threatening lethal off the attack trigger alone later in the game
but in a way, it might be the most problematic, as its basically going to be a problem in any format you stick it in (even if people might not realize it)
No, this early spoiler doesnt mean that spoiler season for MTG Spider-Man is starting
Other than Slivers, from the get go they were meant to be all colors, and were very, very popular as a result