A card whose active skill is able to wipe a floor without matching any orbs. Usually this refers to lasers but can also be cards with actives that deal non-laser damage or actives that are true gravities.

Examples of Buttons

	Ra is a laser that can easily take care of high defense low HP enemies.
	Plutus is a multiplier-based button, doing 300x of the card’s ATK as damage. This will use the base card’s ATK value if used as an Assist.
	Archdemon Lucifer deals a fixed amount of damage; however, it is not a laser. This damage can be affected by a monster’s defense.
	Zeus Verse can also be used as a button. As a gravity that is based off of max HP, it is capable of actually killing a floor.

Examples of Non-Buttons

Zeus-Dios can make the entire board one color to easily kill with, but it is not a button as it requires you to match the orbs.