Those was the only two products printed and the only way to get your hands on the initial Alpha release (outside of the single cards that Wizards would hand out.) Alpha Booster Boxes and packs were officially released to the public on August 18, 1993 at Gen Con, the largest tabletop gaming convention in all of North America
With over 50 million HP, it takes well over an hour to defeat it, even with a high level party
I really like both of them
You can also add a bit of jank that you can safely discard to play lands from outside the game, making this a pretty great card
The other Commands (save for Silumgar's) all have dopey options you never really want much in multiplayer, Commander, or casual gaming, like gaining four life, preventing damage from a spell, or turning off life gain for a moment
An example of a card effect you might not want to use but must would be Merlin Crab