Sinestro, Wielder of Fear

Intimidate (This creature can't be blocked except
by artifact creatures and/or creatures that share a
color with it.)

Fear Projection: Whenever Sinestro, Wielder of Fear
deals combat damage to a player, that player discards
a card and loses 2 life.

Yellow Power Ring: {u}{b}, {t}: Tap target creature.
It doesn't untap during its controller's next untap
step.