I'm not sure what element it would be, but a big cat with the ability "Pounce: attack target creature this turn instead." would be appropriate. Felines are some of the most agile creatures out there, so an ability like "Dodge: damage that would otherwise be dealt to this character has X% chance to miss." Or, due to their stealthy abilities, a cat could have an ability like "Sneak: this creature becomes invisible to your opponent for X turns."