One of my players in a new campaign decided that they wanted to play a cleric with a gambling addiction to a god of chance. Personally, I loved this idea and together we created a happy domain for the minister we like. The only problem is we have never done that before. Would it be too powerful compared to other domains / classes?
1st Level – If you perform an attack roll with advantage, you can forfeit the benefit of dealing +10 damage on hit. You can do this as often as you do with your Wisdom Modifier. You can use all functions again after a long break.
2nd Level – Channel Divinity – Secretly roll the DM into a W20. Guess a number between 1 and 20. If the number is lower than the DM throw, nothing happens and Channel Divinity is lost. If the number is higher, deal damage to all enemy creatures within 30 "of the range you have guessed, and inflict half of the damage you guessed. This damage is radiant for both parties, but can not be reduced in any way.
Tier 6 – You can now use first-level charges to penalize an attack against you. If they hit you, you get +10 damage.
8th Level – You can add your Wisdom Modifier to the damage of a clerical Cantrip you've made.
17th Level – Once a month, you can cast a card on your hand. This is a single card from a 22-card deck with many things. You only drew one card, but if you do not like the first card you draw, you can draw another, but you stick to it.