Grularox, Simic Protector

When Grularox, Simic Protector enters the battlefield, target creature gains hexproof
until Grularox, Simic Protector leaves the battlefield.
"We picked him up on one of the desolate worlds
we saw on our journey. He's proven useful for
the while, but I think he is hiding something" - Krix, Lifeforger