Terraworm

Terraworm
Terraworms are large bosses (18 blocks long, 5 blocks large) found in Strongholes only or summonable with cheats (/summon command). They are very deadly and can devour any mob, except a Dragon (unless if the dragon is a hatchling). They can even crush you to death and knock you away with their tales. They can be climbable but is as slippery as Ice. They are as strong as a Wither. The best way to kill them faster is with Lava or an Icendora. When killed they drop 4-9 slimeballs and 0-5 of any Leather Armour.

Netherworm
Netherworms are the nether variations of Terraworms found in the Nether on Nether Fortresses. They can also devour any mob and can burn any Mob too, excluding Nether Mobs, they will make them have an OHK. Netherworms can swim in Lava lakes so be careful, they are found their too. If you are Fire Resistance and you fall in the Lava Lake, it can jump out like a shark and devour you. The best way to kill them fast is with Ice Weapons. When killed they When killed they drop 4-9 magma creams and 0-5 of any Fire proof Leather Armour.

Enderworm
Enderworms are the end variations of Terraworms found in the End near the Pit of Hyuna (rarly) and sometimes in Obsidian Pillars and can be killed or damaged by an Ender Dragon, Ender Skaidron or Dynonn. Enderworms are very strong and are as strong as Wither Dragons. They are weak in both Fire and Water. When killed, they drop 0-2 Ender Rings.