Nidhoggr

Nidhoggr is a original creature made in the Seven Deadly Sins: Grand Cross

Appearance
Nidhoggr resembles a giant dragon like serpent. It also have spores on it to do it's bidding here

Personality
Nidhoggr shows some inelegance as it sent out it's spore minions and decided to attack the ship his boss fight the player is on in his boss intro.

Abilities
The boss is shown to summon in spore minions to do it's bidding.

Offesnive Thorns - The spore minion uses it's Thorns to attack and deal extra damage to any enemy with poison and bleed effects

Acid Spit - The Spore shoots acid at it's foes

Toxin Bomb - The Spore shoots toxic at it's foes

Demonic Force - The spore shoots a dark eye like orb at it's foes

Pericing Stinger - The spore uses it's powerful vine stingers on it's foe and deal massive damage

Hail of Thorns - The spore uses Thorns to do damage on all it's foes

Twisted Stinger - The spore uses a counter move that does a lot of damage when attacked.

Rampage - The spore uses tentcile like objects to attack it's foes

Dark Emission - Nidhoggr fires a black flame breath at it's foes

Massive Bump - Nidhoggr slams into it's foes to do damage

Wrath of Gods - Nidhoggr fires a massive beam out of it's mouth

Trivia

 * Like previoue Demonic Besst Battles the game labels Nidhoggr (and the spores) as part of the Fairy Race despite no connections to them.
 * The boss was foreshadowed with it's name used as pre-awakened Mono's Holy Relic is named "Nidhoggr's Claws"
 * it's unknown if Nidhoggr is suppose to be the same World Serpent Jormungand been tracking and hunting down or another serpent altogether
 * Nidhoggr as a giant serpnant like dragon with similar appearance could be homage to Manda from the Godzilla series