Condition:

What Zhikr can I make to soften my heart

Answer 

Zhikrullaah softens the heart. Zhikrullaah comprises of Tilaawat of Quraan Sharief, Toubah and istighfaar, Durood Shareef, 3rd Kalimah, etc.

Also muraaqabah of maut, qabr, Aakhirat, etc. will also soften the heart.

Keeping company of the pious, poor and down trodden will all also soften the heart.

Contemplating on the condition of the people in difficulty and hardships will also soften the heart.