In a supernatural/magical sense:
* Blessing: This is the most direct opposite, conveying good fortune and protection.
* Enchantment: This implies a magical effect that is beneficial, though it may not necessarily be divine.
In a general sense:
* Good fortune: This refers to luck and positive circumstances.
* Success: This suggests achieving desired outcomes and goals.
* Prosperity: This indicates wealth and well-being.
* Happiness: This refers to a feeling of joy and contentment.
If you are referring to a curse as a word:
* Compliment: A positive statement or expression of admiration.
* Praise: A strong expression of approval or commendation.
To give you the most precise opposite, please provide more context about how you are using the word "curse."