A couatl sometimes shows its favor to an adventurer or party that has done it a service by gifting the group with 1d4 of its brightly colored feathers. Such a freely given feather, if used as an additional material component, allows a spellcaster to cast planar ally to conjure that specific couatl without expending the typical payment of gold or other valuables-provided the the couatl approves of the service asked for by the spellcaster.