Domain expansion: Perfect gamble

Create a circle with 90 foot circle you. have advantage to hit in this circumference and every turn roll two (2) D6 if you roll the same number roll 1 d6 and and heal that amount  what you rolled and take an extra spell attack every round.  for each level above 1st you will heal 1 more d6 and once you get to 4th level your added dice turn to a D8 and at 9th You gain 3 spells per  turn.  FOR EVERY TIME YOU FAIL TAKE THAT DAMAGE FOR INSTANCE IF U ROLL A 5 AND 6 YOU GET 11 DAMAGE BUT IF U ROLL 6 AND 6 THEN ROLL 6 YOU WILL CONTINUE YOU KEEP GOING TILL YOU FAIL!