the wolf and the blade

In the artic where the indigenous people sometimes might hunt a wolf they'll take a double edge blade and they'll put blood on the blade and melt the ice and stick the handle in the ice so only the blade is protruding. And that a wolf who smells the blood and wants to eat will come and lick the blade trying to eat and what happens is when the wolf licks the blade he cuts his tongue and he bleeds and he thinks he's really having a good meal and he drinks, and he licks and licks and of course he's drinking his own blood and he kills himself.  Do you blame the wolf for trying to eat, or the man who put the knife in the ice?