ninja

The men... are now learning to be ninja or ‘stealers-in’.

For months the Japanese spoke of national-security adviser Henry Kissinger as a ninja—the magician of Japanese legends who performs supernatural acts and practices sorcery.

He immediately suspected they were ninjas because, he said, they were dressed in black and wore masks, trademarks of the mysterious assassins who have been sowing terror across East Java in recent months.

What up, my ninja!