The algae layer had already reached the path traversed by the latter half of the Empyrean Tusk herd. To avoid friendly fire, the Empyrean Tusks refrained from unleashing shockwaves. Only the 1st Empyrean Tusk continued to unleash them, following which it hurriedly sped through the path cleared of algae.
The rest followed it in a hurry. But by the time the 80th Empyrean Tusk set foot on the cleared path, the algae had already covered it. And right as it did so, its foot slipped, causing it to lose balance and tilt in response.
The 80th Empyrean Tusk unleashed a gust of air through its trunk and used the generated thrust to slow down its fall. Its figure slammed into the ground, causing a quake in response while its Internal Inertial Gravity transferred the shock from fall to its skin, releasing a powerful vibration that rattled the algae layer.