From a small sample, Lightning and Psychic Energy appeared the most often (in Gym Heroes it was Lightning Energy, Gym Challenge I did not look at)
(For example, I doubt I would put reach on the green creature in the cycle above.) But Rules Manager Mark Gottlieb realized that keywording it would solve a long-standing problem about who can block what (Creatures that can block fliers versus creatures that can only be blocked as if they were fliers)
In Standard, even non-typal decks play Cavern of Souls often naming Phyrexian just to make their Atraxa, Grand Unifier uncounterable
But from among that botched batch of spells there's one that is perhaps the best enchantment to run in your Commander decks: Rhystic Study Hands down one of the best blue enchantments, Rhystic Study triggers with any spell type and doesn't have any of the restrictions cards like Esper Sentinel and Mystic Remora do
6 Mega Rayquayza makes a triumphant return to Pokmon TCG, last spotted in Evolving Skies one of the most iconic Pokmon TCG sets from the last decade
As long as Lightning Runner is attacking and you have eight Energy, you can activate this effect as many times as you want, regardless of whether youre in an extra combat step or not