Quick-Change Item

Quick-Change Item is the tentative name for these kind of magic items used by Ainz.

Description
In YGGDRASIL, Players need to rely on the game's console in order to take out items from their inventory. However, there was no time to do so during a fast-paced battle, the kind where a split second's timing could make the difference between victory and defeat. Hence, a Quick-Change Item is quite useful for players like Ainz who used one to adapt to situations like those.

Abilities
A Quick-Change Item is used to bring up preregistered items instantaneously in the midst of battle.

Trivia

 * According to Volume 5 of the Manga, the wooden sticks Ainz used in his fight with Shalltear Bloodfallen is a prime example of being labeled as such, one of the Quick-Change Items.