In addition to gaining access to Wild Magic:

• Increase one ability score by 1, to a maximum of 20
• Wild Magic Surge. Your actions can unleash surges of untamed magic. Immediately after you use some sort of Blood Magic (Blood Maledict, Brand of Castigation, etc...), excluding Crimson Rite, the DM can have you  roll 1d20 and if the result is a 1 or a 20, roll 1d100 on the Blood Hunter’s Wild Magic Surge table to create a random magical effect
• Tides of Chaos. You can manipulate the forces of chance and chaos to gain advantage on one attack roll, ability check, or saving throw. Once you do so, you must finish a long rest before you can use this feature again
• Any time before you regain the use of Tides of Chaos, the DM can have you roll on the Blood Hunter’s Wild Magic Surge table immediately after you use Blood Magic, not including Blood Maledict, or hit a challenging enemy with a non-spell attack for the first time in a round. Then roll 1d20 and if the result is 15 or higher, you then regain the use of Tides of Chaos