"I have no clan, but I still have purpose."

Defiant Ogre

When Defiant Ogre enters, choose one —
• Put a +1/+1 counter on Defiant Ogre.
• Destroy target artifact.

The List

Fate Reforged

When Defiant Ogre enters the battlefield, choose one —
• Put a +1/+1 counter on Defiant Ogre.
• Destroy target artifact.

If a mode requires a target and there are no legal targets available, you must choose the mode that adds a +1/+1 counter.

You choose which mode you’re using as you put the ability on the stack, after the creature has entered the battlefield. Once you’ve chosen a mode, you can’t change that mode even if the creature leaves the battlefield in response to that ability.