Blaidd the Half-Wolf

Vigilance, reach, 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.)
Whenever a creature paired with Blaidd leaves
the battlefield for the first time each turn,
sacrifice Blaidd, then create Baleful Shadow, a legendary 6/4 black Shade creature token with trample, menace and haste.