Rules FAQ
With multiple Wolves of the North, each one chooses its stealth target independently, and they may each choose the same target. So you can double up on the strength reduction to bring a beefy target like Tywin into Grey Wind range.
Direwolf.
No attachments. Stealth.
Reaction: After Wolves of the North bypasses a character using stealth, that character gets -X STR until the end of the phase. X is the number of Direwolf cards you control.
Link: Decklists
Rules FAQ
With multiple Wolves of the North, each one chooses its stealth target independently, and they may each choose the same target. So you can double up on the strength reduction to bring a beefy target like Tywin into Grey Wind range.