The £12million striker has notched six goals in 12 appearances for the Swans since switching from Vitesse Arnhem in the summer.
But he has only started three Premier League matches as he adjusts to the English game and Vorm believes there is a lot more to come from the Ivorian striker.
He told the South Wales Evening Post: "I saw in the dressing room how extremely strong he looks. It's awesome. He looks like a beast, which is very scary.
"He does not play as much as he wants to, but he has six strikes to his name anyway. I am confident he will be a key player shortly.
"He is a goalscoring machine in training, showing great finishing skills. He keeps his cool in front of goal and his shots are venomous. He is so strong, it's out of this world."