Greth the Crestfallen

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.)
Creatures paired with Greth the Crestfallen have
"{t}, Sacrifice Greth the Crestfallen: Creatures
you control gain indestructible until end of turn"
"With my death, I failed to defend my kingdom. I
will not make the same mistake."