Define "abandon."

The term "abandon" in the context of scheme cards refers specifically to turning a scheme face down and placing it on the bottom of its owner's scheme deck. This action signifies that the scheme has been effectively discarded from its active state and is no longer in play, but it may still be available for future use when the scheme deck is shuffled and drawn from again.

Choosing this option demonstrates an understanding of how schemes operate within the game, particularly regarding their lifecycle and how "abandoning" reflects a method of removing a scheme from active play without completely discarding it in a way that would permanently lose access to it. It is a nuance that distinguishes this action from simply putting a card into a graveyard or returning it to a hand, which signifies different states of card management and player strategy.