Index

"Index" ( Indekkusu) is a keyword exclusive to the Major Order clan and first introduced in Trial Deck J0: The Fool's Index. Said name appears at the beginning of an ability indicating that it is a Index ability.

How it Works
"Index" allows you to search a specified area, limited to the Drop Zone, Deck, Soul, hand, and in some rare instances, G Zone, for a card and bind it face up. While bound with this ability, the card is treated as being "Indexed". A the end of that turn, all Indexed cards are placed on the bottom of your Deck (or return them to the G Zone face down, if a G Unit was Indexed).

Effect Use Timing

 * "When this unit becomes indexed..." refers to when a card is placed face up into the Bind Zone by the effect of a card with the Index ability.
 * "If this unit is indexed..." refers to if a card is face up in the Bind Zone because it was bound by the effect of a card with the Index ability.

Grade 0

 * Journey's Chronicler, Marith

Grade 3

 * Avatar of the Fool, Joker

Grade 4
TBD

Trivia

 * The kanji "歴史" (Rekishi) can be translated as "History".