Luck Domain

The Luck domain focuses on the fortune - or fate, if you will - that comes to all creatures. The gods of luck promote testing the luck of others and giving aid to those who take risks of their own volition. The gods who may lay claim to good or bad fortune vary in alignment and purpose. Gods who lean more towards good fortune include but are not limited to Tymora, Bahamut and Oghma whilst deities who tamper with the darker side of the coin include Bashaba, Mask and Abbathor.

Bonus Proficiency

When you choose this domain at 1st level, you gain proficiency with a gaming set of chooise

Blessing of luck

You can share your luck with others. after you finish a long rest you can bless a number of creatures equel to twice your wisdom score.
this Blessing of luck last for a number of hours equal to your proficiency bonus
with this blessing of luck a creature can do the following:

Whenever a lucky creature make an attack roll, an ability check, or a saving throw, you can spend one luck point to roll an additional d20. You can choose to spend your luck points after you roll the die, but before the outcome is determined. You choose which of the d20s is used for the attack roll, ability check, or saving throw. You can also spend one luck point when an attack roll is made against you. Roll a d20, and then choose whether the attack uses the attacker’s roll or yours.
If more than one creature spends a luck point to influence the outcome of a roll, the points cancel each other out; no additional dice are rolled. 

Channel Divinity: Lucky Healer

Starting at 2nd level, you can use your Channel Divinity to help 

Whenever you use a spell to restore hit points to a creature, the creature can add your Wisdom modifier to their next ability check or saving throw.

Luck is on your side

Beginning at 6th level, as a reaction when a creature hitpoints are reduced to 0 hit points but not killed outright, you can spend there luck point to instantly heal them for your cleric level + your wisdom bonus

Gambler faith

At 8th level, you gain the ability to stay lucky, when you spend your luck point from your blessing of luck you can call a number on a d4. if the number and the result of the d4 are the same you regain your luck point.

Master of fate

when you use your luck point of your blessing of luck you can roll 2d20 and choose which roll you pick.
when using your gambler faith you can choose 2 numbers on a d4. when you regain your luck point you also heal your self with a d8+your wisdom