A Firebird Feather is a quest item that is needed to complete the Hero's Quest. It can be obtained as a drop from a Firebird which can be found on the north side on the island of Entrana. There exists a presumably unobtainable cooled down version of the feather, which could have been thought as a result from either adding water to the feather or upon successfully picking it up.
In order for the player to pick up the Firebird's feather, the player must have Ice Gloves (a drop from the Ice Queen) equipped.
Players who are currently engaged in Hero's quest will take damage if they attempt to pick the feather up without wearing Ice Gloves. However, when players are near death it will not actually kill them.
Player's who attempt to pick the feather up when they are not engaged in Hero's quest will not take any damage, and will produce dialogue. See below for an entire transcript.