SENSOs

In combat
SENSOs are special units that boast unique abilities. Only one SENSO can be in a deck, and they spawn at the beginning of a battle, in a predetermined position, before either players' turn begins. All SENSOs drop 3 SENSO-Gel and grant the opponent 3 Combo Power on destruction.

In chests
SENSOs are considered a separate rarity when opening chests, but are considered a rare card for tournament standards and upgrading.