Perfect green dragon scale

A Perfect green dragon scale is one of the scales of the four Chromatic dragons that Vannaka can ask you to fetch him, as part of his Slayer challenge. Green dragons and Brutal green dragons can drop this scale, but only when the player has taken the challenge. The scale is not a guaranteed drop, so the player should be prepared to slay several dragons to obtain one. Multiple scales can be obtained, but all are consumed when the challenge is completed.

Also see:
 * Perfect blue dragon scale
 * Perfect red dragon scale
 * Perfect black dragon scale

Dropping monsters
Perfect green dragon scale