Phoenix quill

A Phoenix quill is the secondary ingredient in creating Phoenix and Reborn phoenix pouches. The five only known ways to get these so far (except by buying from other players or the Grand Exchange) is by:
 * Completing the quest In Pyre Need (one-time five quills).
 * Challenging the Phoenix with level 51 Slayer each day for 5 more quills after completing the quest.
 * Receiving them in a Challenge Mystery Bag.
 * Finding some in a Bag of lost items (after completing the easy desert tasks). Note: this is currently not possible because the the GE price exceeds 5,000 coins.
 * Receiving them as a common prize on Treasure Hunter.

10 phoenix quills can be used to skip directly to the fight against the Phoenix, avoiding all the Reborn creatures in the previous caves of the Phoenix Lair.

It takes roughly 2 minutes to go through the Phoenix Lair which means that paying 10 phoenix quills breaks even if you can otherwise make coins per hour.

Phoenix quill