Ghoul Pet

The Ghoul Pet is a combat pet dropped by Crypt Ghouls near the Graveyard, one of three pets obtained from mobs used in slayer quests. The other two are the Hound Pet and the Tarantula Pet. The chance of one dropping is 1/25000 without or.

The Ghoul Pet's second ability, Zombie Arm, also applies to the Ornate Zombie Sword and Florid Zombie Sword, which are upgraded versions of the Zombie Sword. This makes the Pet viable for Healer/Tank hybrid builds (especially if the Tank has a Reaper Scythe).

Obtaining
In order to obtain the Ghoul Pet, head towards the cave in the Graveyard near the Coal Mine. The Ghoul Pet can be dropped by killing the Crypt Ghouls inside of the cave. This pet is a super rare drop from the Crypt Ghouls.

The Pet has a 1/25000 drop chance (confirmed from looking at mob drops in bestiary)(1/33333 for epic and 1/100000 for legendary without pet luck and magic find), making it comparable to a Pray RNGesus drop.

Kat Caretaking Costs
Kat can upgrade all rarities of this pet except legendary; this costs varying amounts of money and sometimes resources. For each level the pet has, there is a 0.3% discount. For example, at level 50 there will be a 15% discount to the price listed below. Also, the cost listed is for the pet of that type to be upgraded, after which time the rarity will be that of the above type. The time listed is also in real life days as opposed to the in-game equivalent.