You say "Deceiver".
Can you tell me more about this "Deceiver"?
Was he created by Allah ?
If the Deceiver is not created, wouldn't that make
the Deceiver as equal to God or
the Deceiver is part of God called Lying Spirit of God?
Attribution of falsehood onto God is due to Deceiver promising to lead mankind astray from straight path.
Deceiver has his ways to falsify the covenant sent by God for mankind.
But Words of God can never be changed as the Creator have been sending His messengers to fight falsehood promised to be spread by the Deceiver till end of days.
O mankind, fear your Lord and fear a Day when no father will avail his son, nor will a son avail his father at all. Indeed, the promise of Allah is truth, so let not the worldly life delude you and be not deceived about Allah by the Deceiver. 31:33