j'ai retrouver le nom exact mais pour traduire en fr non dsl
ce sont des "vagrants"
voila ce qui est dit sur le wiki us (dsl de ne pas traduire je risque d'etre aproximatif dans les thermes ^^)
Also known as Drift Items. Vagrants are rare monsters that appear in specific places after other players have died and lost a large amount of humanity, or have dropped certain items. As such they will only spawn during online play and will not appear in an offline game. The Vagrant will drop something depending on the world and the player that spawned it. Usually the drop comes in the form of humanity or consumable souls.
There are three types of vagrant: good, evil, and Black Phantom evil. Good looks like an egg with legs. Evil vagrants look like a good vagrant with the egg hatched, the monster inside has pincers making it look similar to a small crab.
Good Vagrants can be thought of as just rare little treasure chests.
Evil Red Vagrants spawns when someone has dropped an item and it has been left for over 24 hours. They have a weak melee attack and drop the item that was dropped when they are killed. It has little defense.
Black Phantom Vagrant appears when someone has left a bloodstain with lots of souls and humanity and has failed to recover it. They have a very strong melee attack and projectile attack, can dodge spells and if you try to attack them head on they will parry and follow up with their long range attack for about 2500 damage. They take 1/4 damage from fire, lightning and magic and 1/2 damage from regular, strike and slash. It is recommended to kill them with arrows. They drop anywhere between 2 and 99 humanity when killed.