He works with basically all the mechanics bar those that find a green dork and he instantly gives you near infinite gas
If speed is everything then run Crypt, and if you have minimal graveyard recursion then run Relic
Furthermore, ward makes this Golem a pain to remove in most cases
People say its a ramp spell and a speed bump, because opponents are less likely to attack into it and give you a card, or worse, trade with it
The burn spell has competed with Lightning Bolt in other formats (though Lightning Bolt usually ends up winning), and its extremely strong at swinging any kind of race, more than offsetting the life you lose to play an untapped Sacred Foundry
Now that Strixahaven is out, players may want to note which cards are most valuable and which are bulk rares