Oblivion Ring questions

[blueneverfails]

ok so say I have grip of chaos out. And my opponent plays an oblivion ring, first question is can, it targert it self. Second question when it targets itself, and removes itself from the game will the O ring just come back or will it stay gone forever?

I'm 95% sure that it can target itself and that it will stay gone forever, but I have no idea where in the rules this would prove my thinking and so I'm not really sure how to explain this to a player. Dam you EDH for making crappy rares sooo much fun.

Edit: as I read Oblivion ring again I feel like the word another makes it unable to target itself...... might have just solved my own question.

Oblivion ring:
When Oblivion Ring enters the battlefield, exile another target nonland permanent.
When Oblivion Ring leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Grip of Chaos:
Whenever a spell or ability is put onto the stack, if it has a single target, reselect its target at random. (Select from among all legal targets.)

[practical joke]

You have solved your question:

Grip of chaos makes o'ring targetting something at random that is legal, oblivion ring itself not a legal target.

[Jsang]

If there is no legal target for Oblivion Ring, can it be played? And is it a 'come into play ability' which can be stifled? thank you!

[TheBirdMan]

Oblivion ring can definitely be played.

snip

[Zlatzman]

Just to clarify:

If there are legal targets for Oblivion Ring, the trigger goes on the stack, and it is certainly possible to stifle that trigger. Both the "enters the battlefield"- and "leaves the battlefield"-triggers can be stifled.

[Jsang]

Thank you! And I guess this can apply to Journey to Nowhere too.

[cdr]

If there are no legal targets, Oblivion Ring will trigger, but when you attempt to put the trigger on the stack the trigger will be removed because you are unable to choose a target. All of this happens before anyone gets priority.

603.3. Once an ability has triggered, its controller puts it on the stack as an object that's not a card the next time a player would receive priority. See rule 116, "Timing and Priority." The ability becomes the topmost object on the stack. It has the text of the ability that created it, and no other characteristics. It remains on the stack until it's countered, it resolves, a rule causes it to be removed from the stack, or an effect moves it elsewhere.

603.3d. The remainder of the process for putting a triggered ability on the stack is identical to the process for casting a spell listed in rules 601.2c-d. If a choice is required when the triggered ability goes on the stack but no legal choices can be made for it, or if a rule or a continuous effect otherwise makes the ability illegal, the ability is simply removed from the stack.