Sirius, Best Boy

Lifelink, Soulbond (You may pair this creature with another unpaired creature when either enters the battlefield. They remain paired for as long as you control both of them.)

As long as Sirius, Best Boy is paired with another creature, each of those creatures has "When this creature takes damage from any source, divide it in any way between this creature and its soulbond."
—
"Who's the goodest boy?" -His Owner