Mahakal Tattva
Blessed by the 11th Rudra, Lord Hanuman. Provides extreme courage, fearlessness, physical vitality and victory.
"ॐ नमः शिवाय" (Om Namah Shivaya) or "ॐ त्र्यम्बकं यजामहे सुगन्धिं पुष्टिवर्धनम्"
For best results, wear after morning bath facing East or North on Monday or Shivratri.