This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Ifrit (Arabian)
Ifrits live in a society structured along ancient Arab tribal lines, complete with kings, tribes, and clans. They generally marry one another, but they can also marry humans. While ordinary weapons and forces have no power over them, they are susceptible to magic, which humans can use to kill them or to capture and enslave them.
As with the jinn, an ifrit may be either a believer or an unbeliever, good or evil, but is most often depicted as a wicked and ruthless being. Popular tales generally depict an enormous winged creature, either male or female, who lives underground and frequents ruins. They tend to be made of smoke and fire.