Shield Guardian

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 Shield Guardian is paired with another creature, each of those creatures gets +0/+2 and "Whenever this creature would be dealt damage, instead it takes half that much damage rounded
up and the creature this creature is paired with is
dealt half that much damage rounded down."