This means they can't be attacked by your rivals, essentially allowing you to earn points before retreating to safety
However after a couple of playtest games with the Broken Jar deck, Erik realized he was leaving money on the table and went for a last-minute ticket to Vienna
Since MTGA was released close to when the pandemic started, I think the focus was to improve the game rather than have a quality-of-life change after its beta version
However, some stores put it out early, or had some available later at the full price
When combined with bombs such as Terror of the Peaks or Titan of Industry, Calamity can end the game very quickly, especially since it can be cheated into play early using cards such as Smugglers Surprise or using any of the various ramping options available to Gruul (green/red) decks
The former should be used at common and uncommon while the latter should be used at rare and mythic rare