Rangers of Ithilien

Some spells and abilities that cause the Ring to tempt you may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. The Ring won't tempt you.

When Rangers of Ithilien's ability triggers, you can choose not to target a creature just to have the Ring tempt you. However, if you do choose a target, and that target is illegal at the time the ability tries to resolve, the ability won't resolve and none of its effects will happen. The Ring won't tempt you.

The Ring gains its abilities in order from top to bottom. Once it gains an ability, it has that ability for the rest of the game.