Happiness Switch

Happiness Switch is a keyword.

Details
It has the same mechanics as the Denjara Switch ability does for D2 Fields, being able to turn a card upside down to trigger an ability. However, the "proposal" ability featured on the only card with the ability is an effect that has no game implications.

Reminder Text
The latest reminder text for Happiness Switch reads;

Cards with the Happiness Switch ability

 * Please Marry Me!

Color percentages
 There are a total of 1 card with the Happiness Switch ability, which divide by civilization as such:
 * = 100% (1/1)