General Method Description

Summoning is mainly a support skill that helps you earn money in other activities, but the spirit cobra is one of a handful of familiars that can be used to earn money directly. Its special move, Ophidian Incubation, transforms a regular, inexpensive egg into a valuable cockatrice egg for use in Herblore and Summoning.

Like all special moves, the number of times you can cast Ophidian Incubation is limited by your special move points. However, recent changes to the Summoning skill have made it possible to use this scroll very quickly, so you can actually make a significant amount of money per hour with this method.

That said, I recommend only doing this method for short periods of time -- it involves a lot of repetitive mouse moves and clicks, and performing these moves for hours at a time could increase your risk of developing a repetitive stress injury.

Note that Summoning efficiency does not improve with higher levels, so the two sub-methods here are identical.