Havik's Neoplasm special, documented in official Mortal Kombat 1 patch notes together with its Enhanced version.

Havik moves, skills and special abilities
Playable Mortal Kombat 1 fighter.
Special Moves
7A Havik attack whose repeated use within a single combo was adjusted in an official update.
Havik's tether-style Blood Bath mechanic. Official updates made it continuously drain Havik's health while granting meter and restricted activation to low health.
Character special move.
Character special move.
Character special move.
A Havik attack specifically documented in official WB parry-interaction updates.
Kombos
8Ground kombo string.
Ground kombo string.
Ground kombo string.
Ground kombo string.
Ground kombo string.
Ground kombo string.
Ground kombo string.
Ground kombo string.
Aerial Kombos
3Aerial kombo string.
Aerial kombo string.
Aerial kombo string.
Fatal Blow
1Fatal Blow.
Fatalities
2Fatality. Perform at close range.
Fatality. Perform at close range.
Brutalities
7Press Forward, Down, Back, Up during the hit. Final hit must come from Self-Destructive Barrage. Must be near the opponent.
Hold Forward during the hit. Final hit must come from Skab Stab.
Hold Down during the hit. Final hit must come from Flesh Wound.
Hold Up during the hit. Final hit must come from Helping Hand.
Hold Forward during the hit. Final hit must come from Seeking Neoplasm. Must be near the opponent.
Hold Back during the hit. Final hit must come from Twisted Torso.
Hold Forward during the hit. Final hit must come from Neck Snapper.
Animality
1Animality. Perform at mid distance.