Theres also Lost Vacuum the Item card which has been a crucial tech option for managing Stadium cards or Tool cards like Forest Seal Stone, providing decks with flexibility for situational plays
For Base Set, the actual sequence length could be as low as 3 (1 holo in every third pack, though it probably isnt as that would mean all the holos would be in packs with the same pack art), however I am going to be using a sequence length 216 packs (1 case of 6 booster boxes with 36 packs each) for all (or at least most) sets from generation 1 to generation 5, as the lowest insertion rate I found for this era was 1 per case
It "protects" all your things at once and can be used to cash in any size of dork
Amassing an Army every turn isn't quite making a 1/1 flyer
This curve deals six damage, gains two life, draws an extra card and generates three threats and a piece of interaction, all in the first three turns
Generally the Japanese cards are rarer when: They have only been released in Japan and wont be released elsewhere They have only been released in Japan and wont be released in other countries for a while yet They are cards from a promotional event only in Japan