Hundun

Hundun is the summoning beast of Ye Yan.

Background
According to Ye Yan's Flag Demon Huan Chaojiao, Hundun was born when Heaven and Earth separated (when the Earth was formed), therefore it is billions of years old. When Ye Yan was 12 years old, he found and formed a summoning pact with Hundun, allowing him to summon it ever since.

Personality
Hundun doesn't like being called fat or anything related to the term. It also shown signs of fear such as sweating when faced against water related attacks, which is its weakness.

Appearance
Hundun is a giant, round yellow creature with a pair of wings that allows it to fly, and four legs. It is also able to expand and shrink its size at will.

Abilities and Powers

 * Invulnerability: Due to its thick hide and elasticity, Hundun is literally invulnerable, capable of withstanding a hit from the Star Shattering Iron Gourd used at 100% power and deflect it, and get bombarded by the Huang Xiaoyan's Million Spell Tags Formation and remain unscathed.
 * Strength: Hundun is extremely heavy, therefore one stomp from it is extremely fatal, as seen when it easily crushed Lan Ling and Luo Xiaobao's legs just by stepping on them. It is also able to plow through buildings with ease. However, its strength is shown to be inferior to Xi Sha since she was able to hold up its foot to prevent being stomped on.
 * Flight: With its wings, Hundun is able to fly at high speeds.
 * Size Changing: Hundun is able to change its size, making it able to sneak attack people by suddenly expanding when under them while it's small.
 * Adsorption: Hundun is able to absorb objects into it using its elastic hide. Ye Yan used this ability of Hundun and unsummoned it to take away a piece of Demon Lord Armor from Che Yongtai 's previous incarnation, which reverted his power.

Weaknesses

 * Water: Hundun is weak to water. When hit by large amounts of water, Hundun will lose its strength and size, causing it to shrink down to the size of a hand.
 * Nullification Palm: Deng Yuankui's Nullification Palm is capable of nullifying Hundun, causing it to disappear and unable to be summoned for three days.