Blood Ooze

Amorphous. The Blood Ooze can move through a space as narrow as 1 inch wide without squeezing.

Spider Climb. The Blood Ooze can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Multiattack.  The Blood Ooze makes two pseudopod attacks, or uses it's Vampiric Splay

Pseudopod. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 9 (3d6 + 2) bludgeoning damage plus 4 (1d8) acid damage.  On an attack role of 20, the target also takes 9 (2d10) necrotic damage, which the Blood Ooze then heals it self for the same amount. 

 Vampiric Splay (Recharges 5-6).  The Blood Ooze reaches out with a mass of its body in a 15 ft cone.  Each creature in that cone must make a DC 16 Dexterity saving throw, taking 4d6 necrotic damage on a failed save, or half as much on a successful one.  If at least one creature is hit, the Blood Ooze heals for half the damage. 

Split. When a Blood Ooze that is Medium or larger is subjected to lightning or slashing damage, it splits into two new oozes if it has at least 10 hit points. Each new ooze has hit points equal to half the original jelly's, rounded down. New oozes are one size smaller than the original ooze.