At four mana, the best use for Razor Pendulum is discarding to Masticore (a fellow four-drop artifact) or sacrificing to Krark-Clan Ironworks (hey look, more four-drops!)
These extra slots are negligible to the efficacy of most decks, making play for veterans feel hollow
My basic take at the time is that Legacy is an ocean of piss, into which pissing does not dilute much at all, and I say that as someone who likes Legacy
The deck is slightly scattered for a modern precon, struggling under the weight of being both a Dragon tribal deck and goad deck
Its one of the main ways to avoid losing the game with Phage, the Untouchable, and it has a lot of cool applications to build around it
202.3 The converted mana cost of an object is a number equal to the total amount of mana in its mana cost, regardless of color