Power Rings - Yellow

I wasn't planning to mention "yellow" next, but since it's my name-day I'll post about this, 'cos it's one of my favorites.
 SINESTRO CORPS (FEAR)

In blackest day, in brightest night,

Beware your fears made into light

Let those who try to stop what's right,

Burn like my power*... Sinestro's might!

The first yellow ring was acquired by Sinestro following his banishment to the anti-matter universe of Qward, and could only be recharged by fighting a Green Lantern. Years later, after losing the ring to Guy Gardner and reacquiring it, Sinestro created the Sinestro Corps. The yellow rings used by the Sinestro Corps are fueled by fear, and Lyssa Drak explains that members of the Sinestro Corps are chosen for their ability to create great fear in others. Through a string of Green Lantern stories titled Tales of the Sinestro Corps, she describes the numerous ways in which Sinestro Corps members spread fear through the universe. At the conclusion of these tales, she explains to Amon Sur that in order to become a member of the Corps one must free themselves from a small prison. With their yellow power ring completely drained of its energy, they must provide it with the spark it needs to accomplish this feat by facing their own greatest fear. According to Ethan Van Sciver, the ring's symbol is based on ancient carvings made by beings who had looked into the gullet of Parallax and survived. It has the same basic capabilities as a Green Lantern power ring (i.e. solid light constructs, flight, force-fields e.t.c.), but is drained of energy in the presence of a Blue Lantern ring.
Yellow rings select individuals who "have the ability to instill great fear".