Samwise the Brave

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 Samwise the Brave is paired with
another creature, each of those creatures gets
+2/+2.
"I made a promise, Mr. Frodo. 'Don't you leave him,
Samwise Gamgee.' And I don't mean to."