om klīṁ krīṁ hūṁ kroṁ sphreṁ kāmakalākāli sphreṁ kroṁ hūṁ krīṁ klīṁ svāhā |

1) Kāma bīja - klīṁ क्लीं�

Consists of ka + la + ī + bindu (dot)

Ka represents Kriṣṇa or desire; la represents Indra: ī represents contentment and satisfaction and the bindu represents comfort by dispelling pains and miseries This is the reason why bindu is used in all the mantras. Without bindu, a bīja is not complete. Thus kāmabīja fulfils all material desires. Every bīja has inherent nāda (subtle sound), which subtly causes the sound and this nāda is the power or Grace of Śakti, which is to be visualized in the form of light to derive the full effect of a bīja

2) Kāli bīja - krīṁ क्रीं�

Consists of ka + ra + ī + bindu (dot)

In this bīja, ka represents Kāli; la represents Brahmā; ī represents annihilation of miseries. This bīja, due to the power of Brahmā (not Brahman; here it refers to the god of creation), Kāli removes all pains.

3) Bhairava bīja - hūṁ हूं� (this is also known as kūrca bīja, subtly referring to ājñāa cakra)

Consists of ha + ū + bindu

Ha represents Śiva; ū represents Bhairava. Bindu refers to removal of sufferings. This bīja is capable of removing ill effects evil forces. This acts as a protective bīja. 

4) The bījā kroṁ (क्रीं�) is formed out of three alphabets –ka + ra + ma with a bindu. The alphabet ka stands for joy and fame. The alphabet ra is considered as powerful as it is the bīja of agni, the fire. Any mantra with ra bestows supernatural powers. The alphabet ma stands for comforts in the present and

future births. The repeated chanting of kroṁ will give all-round prosperity and happiness.

Bhūtabīja sphreṁ (स्फ्रें� ) is formed by joining s + ph + ra + e + and bindu (dot) {स् + फ् + र + ए and बि�न्दु}. And in subsequent discussions it is only mentioned as sphreṁ (स्फ्रें� ). Hence sphreṁ (स्फ्रें� ) appears to be correct. Bhūtabīja represents formation of worldly creation. (There is a reference to Bhūtabīja in Śrīmad Bhāgavata Mahāpurāṇa.)

This is the revised and correct mantra:ॐ क्लीं� क्रीं� हूं� क्रीं� स्फ्रें� का�मकालीं�का�लिलीं स्फ्रें� क्रीं� हूं� क्रीं� क्लीं� स्वा�हा�।om klīṁ krīṁ hūṁ kroṁ sphreṁ kāmakalākāli sphreṁ kroṁ hūṁ krīṁ klīṁ svāhā |