Obviously Vintage is about some pretty unusual things, but Lodestone Golem is really just a quarter of the price paid to keep Mishras Workshop unrestricted
Its a strong enough planeswalker to be a win condition on its own
Hawlucha is a frustrating card to be forced to have in the active spot at the beginning of the game, but if it stays in the deck for later use, it is a crucial piece of utility for the Dragapult strategy
On that front, the team took an effect that started with a blue card from Seekers of Kamigawa, a 2005 set, and turned it into a red card effect creature in Casey Jones, Vigilante
Since were in green we have access to some spice in [Card]Parallel Lives[/Card], [Card]Primal Vigor[/Card] and [Card]Second Harvest[/Card]
After that, you let the 2nd Mirror Entity trigger to resolve, do the same thing and tada, you get infinite ETB triggers