You’ve learned a method of killing your foes and healing with surgical vampire implants. You gain the following benefits:

• If you grapple someone from behind while in stealth, they get disadvantage on their saving throw.
• You can use your action to try to leap on a creature from up to 10ft. To do so, make a acrobatics check. If you succeed, the creature is restrained until one escapes or the one who started, stops.
• All damage made by bites are doubled during this.
• If you manage to bite a victim, they bleed. If you kill them with a bite while grappled. you restore 6hp.