darkvision You can see in dim light within 120 ft. of you as if it were bright light and in darkness as if it were dim light.

Feeding if you don't feed for 1 day you feel physically weaker, 2 days you have sunlight vulnerability (disadvantage in sunlight), 3 days you can't go outside during the day you take 1d8 fire damage for every hour outside, 4 day you start to lose vampire strengths, 5 day dc15 constitution save or you lose control and feed on the first creature you see draining them to death if you can.

undead You have advantage on saving throws against disease and being poisoned, and you have resistance to poison damage. You have advantage on death saving throws. You don’t need to eat, drink, or breathe. You don’t need to sleep, and magic can’t put you to sleep. You can finish a long rest in 4 hours if you spend those hours in an inactive, motionless state, during which you retain consciousness.

spider climbing You have a climbing speed equal to your walking speed. In addition, at 3rd level, you can move up, down, and across vertical surfaces and upside down along ceilings, while leaving your hands free.

vampiric bite (1d6 + Dex) piercing damage plus (2d6) necrotic damage. The target's hit point maximum is reduced by an amount equal to the necrotic damage taken, and the vampire regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.

improved sense Your strength, dex, and con are all boosted to 13 if you already have 13 the ability stays the same.