There are four EDH spaces here, I think
Instead, these are part of the Stellar Sights bonus sheet, which means these cards can be found alongside many other lands in any type of booster pack but are not being added to any formats they aren't already a part of
Typically it was attached to counterspells like Spell Crumple and therefore dodged the technically removal issue, but it has been around for a while
The key tweak is the shift in how energy works: rather than filling your deck with specific energy cards, you simply select the type (or types) of a deck when building it, and energy is automatically generated once per turn for you to attach how you wish (for two-type decks, which are required for the Dragon Pokmon lines such as Dragonites, which type comes up next is randomised, which effectively replicates a multi-type deck equivalent in real life)
That creature is a Hero in addition to its other types
Again, with only 40 cards you are spread thin on answers and may need the same one repeatedly in a long gruelling match for which the Elixir comes in handy