That ones from Call of Legends, while this one hails from the earlier HeartGold & SoulSilver set
All the possible combinations are based around a roster of core decklists, however, which are also handily laid out in the blog post, along with a table explaining the 20 cards from the tabletop set being swapped for alternatives in MTG Arena, to account for the slightly different metas
Rakdos has plenty of that, and chaotic creatures like Khrn the Betrayer or Alexios, Deimos of Kosmos can supplement your deck nicely
You can only use this effect of "Galatea, the Orcust Automaton" once per turn
The popularity of the industry has made it evolve into something entirely different from when it first came out
As Loot, the Pathfinder showcases, you can get some absolutely nuts abilities using this mechanic