The Dark Viper is a gun that Max can obtain in Dark Cloud 2. This weapon is only built up from the Grenade Launcher, and it has the Absorption Coin ability: you have a chance that you'll recover a amount of health which is determined by the damage caused by your attack. Like the Grenade Launcher, it fires explosives grenades at a low fire rate, but they'll cause more damage against chill-based enemies in general. You can find the Dark Viper in dungeons' chests, you cannot buy this weapon in any shop, but you can invent it. It's a medium-tier weapon (Tier 5), meaning that it will gain 4 Synthesis Points (SP) per level-up.