My question is something I really don't understand. Soothjaw states "When a friendly wulven ally is killed.."

What constitutes a wulven ally? Does it have to have the tagline "Wulven Ally" or does any "Shadow Ally- Wulven" get shuffled into my deck when it dies and interacts with Soothjaw.

TLDR; Does Soothjaw's ability only activate with cards that posses the tagline "Wulven Ally", or will any dying wulven trigger the effect?