High Roller

You have come into contact with magical dice the way people get them are strange. Some wake up with them, others are granted by the gods. Others steal them from those who have them. They allow you to put your skills on the line for a possible upgrade. Enhance an attack, or weaken it. Its all in the power the lady of luck grants you. You can bet damage from rolls. Or health gain from spells or potions.

Dice master

Starting at 3rd level, you gain proficiency with the Dice game. And you gain a set of magical die you have control over in games. You gain advantage on rolls for the dice game.

Raise

When you choose this archetype at 3rd level, you gain the ability Raise. You may choose to bet numbers from your damage rolls. Or from healing effects that effect you. Via a potion or spell that targets you. 

For instance you are healed for 6 hp. You can bet anywhere from 1-6 if you choose. You will then roll a percentile die. If the number is odd. The numbers you bet dissappear. If the number is even you gain twice the amount you bet. Of you roll a 1. You will take the numbers you bet as damage. If you roll a 100. You will triple the number instead.

Double or nothing

Dex mod a day. Make an enemy reroll a attack roll against you. If the second roll misses the attack fails. If it succeeds the attack is counted as a critical hit

Double down

At level 13 you may roll an extra attack in one attack action. You must roll to hit twice. If either miss, the attack fails. If both succeed you roll damage die for two attacks within the same action.

Loaded dice

Hitting level 17 once a day. You may choose to make 1 roll the highest it can be meaning a Critical hit or a 100 on a percentile die. Maximize healing from a spell or effect. Or make a enemy crit fail on a attack roll.