Vampire

Vampire attack bites and gives a poison for a while.
It can fly and is very fast and is rare.
The damage you 3 lives every 3.5 seconds.
It is in caves like bats and sleep upside down.
It has 6 lives.

Tornado Which

Tornado witch casts a spell on you which makes a tornado into you when you are thrown into the air.
It throws you 10 blocks up in the air and fall down and lose lives.
It has 4 lives. It's very slow and can drift a block above the ground.

Thief

He is very very fast and has two lives.
He can make themselves transparent almost invisible.
He has a knife and if he stabs you in the back door you no matter what.
But if he hits you in front or side damage he's half a life.
He sticks 2 times per second.

Worm

The worm lives in the sand it sometimes come up but then it is very slow.
It makes grub holes in the sand. the claims 5 lives when it bites.
It has 12 lives.