As I know, due to jealousy, or some base cause, the Tantriks use cheap tactics to overcome the adversaries, which can ruins one's life .
Also I heard that if someone is affected by Black Magic then they should under go Parikaram to remove the Black magic applied on them.
Does something like black magic exist in this millennia(kaliyuga) ?
Black magic is real and is mentioned in Vedas itself.
Quoting from this page:
Core of Atharva Veda
The subject matter of the Samhitā of this Veda has no systematic division in the first twelve kāṇḍas. The last two again, deal with miscellaneous topics. However, there are eight topics that are covered:
1.Bhaisajya: diseases, their causes and cures 2.Āyusya: supplications for longevity 3.Paustika: worldly progress and welfare 4.Ābhicārika: destroy or harm enemies who obstruct progress 5.Prāyaścitta: expiatory rites 6.Rājakarma: political system 7.Brahmanya : nature of Brahman, the Absolute.
.....Abhicarika Suktas
The Ābhicāraka Suktas are aimed to destroy or harm enemies who obstruct our progress or try to destroy us. This is said to be achieved by pleasing or appeasing certain deities or spirits and getting one’s wishes fulfilled through them. This technique is called ‘yātu’ or ‘kṛtyā.’ The number of such suktas is rather large. Destruction of one’s enemies including the lovers of one’s spouse, annihilation of evil spirits, mesmerizing others through whom one can get one’s desires fulfilled are some of the topics dealt with in these suktas. The word ‘kṛṣṇendrajāla’ is sometimes used to indicate the type of black-magic rites depicted here.
