Till Death Do Us Part

Enchant creature
Enchanted creature has "If another creature you control is about to be put into the graveyard, you
may sacrifice this creature instead as a
replacement. If you do so, you gain 10 life."
"If you live to be a hundred, I hope I live to be a
hundred minus one day, so that I never have to live
a day without you." - Winnie the Pooh