The Engagement

Soulbound - Enchant player to another player.
This spell can't be countered. When this card is in play, soulbound players are indestructible and can't be targeted by spells or abilities your opponents control.
Enchanted creatures gain a +1/+1 counter every year and have a lifelink. They love each other so much.
"Never have I ever been engaged" - B. Murphy