Alma 47:4

Now behold, this was the desire of Amalickiah: for he being a very subtle man to do evil, therefore he laid the plan in his heart to dethrone the king of the Lamanites.

This was exactly what Amalickiah wanted. He was very clever at doing evil things. He had a plan in his heart to remove the king of the Lamanites from power.

This was exactly what Amalickiah wanted. He was a cunning man skilled at evil, and he’d already laid plans to overthrow the Lamanite king.