Advantages:

Can go invisible at night or when hanging (great for trying to steal wyvern eggs and then dying)

Can hang on walls (honestly completely op ability)

Gets blood packs from hit

Can make a liquid in inventory to get 30% tame progress and effectiveness when eaten next to a tame for 200 blood packs

Night vision (self flash bang)

Can hold creatures and when life sucking mode is turned on it deals pinching damage

Can fly (wow original)

Screech which locates creatures in view range

Disadvantages:

Ugly as all hell