The Killer Stinger is an enemy in Crisis Core -Final Fantasy VII-. It is the strongest in its family of enemies.
Zack should have a high Spirit rating to withstand the Killer Stinger's powerful magic attacks. Zack may need more than one Costly Punch to defeat this foe because of its high HP. A good strategy is to cast Graviga on it first, then hit it with Costly Punch. Be wary of its Heartless Needle and various Slash abilities that can damage AP, MP, and SP individually!