Choose one —
• Destroy target artifact.
• Put target creature on the bottom of its owner's library.
• Counter target instant spell.
10/1/2008 You can choose a mode only if you can choose legal targets for that mode. If you can’t choose legal targets for any of the modes, you can’t cast the spell.
10/1/2008 While the spell is on the stack, treat it as though its only text is the chosen mode. The other two modes are treated as though they don’t exist. You don’t choose targets for those modes.
10/1/2008 If this spell is copied, the copy will have the same mode as the original.