As soon as he reached a certain distance from the beast, he stood still and summoned Ice-class and Fire-class beasts. He grouped them as he ordered the Fire-class beasts to heat up the ape's whole body.
The ape felt the heat, but it wasn't hot enough to pierce through the scales, so damage of the heat was negligible.
One can see the fury in the ape's eyes the moment that it turned around and looked for the culprit that disturbed it from what it was doing. Its eyes went red from the anger as it howled that made the cave shake and the stalactites fell on the ground as if it was raining spikes.
Arie dodged the falling sharp things while keeping himself low, but even if he uncovered himself, the ape wouldn't notice him because its focus was deluded by Urie's insolence that its status as the strongest beast was challenged.