Wang Tao had previously killed a Level 4 Frozen Zombie Lord, and its skull was the [Fourth-order Weapon: Miniature Ice Lord's Skull]. The Frozen Zombie Lord he killed this time was Level 5, so it made sense for the dropped Level 5 biological weapon to be reasonably powerful.
[Fifth-Rank Weapon: Medium Frozen Overlord Skull]
[HP: 10000/10000 (Limit 200000)]
[Status: Can Be Awakened]
[Enhancement: Ice Chain]
[Compatibility: 0%]
[Ice Chain: The more ice attribute allies in the nearby vicinity, the higher the extra attack and defense for oneself and allies (The weapon's HP limit affects enhancement effect and range)]
Compared to the Level 4 weapon, this Level 5 skull was "medium-sized," and its overall appearance was indeed significantly larger than the previously acquired miniature one.