rarity for 4 stars

by ウザさん posted Jun 30, 2019
I’ve been trying the 10+1 for a few times already, and the first time i got, i got only one 3 star card? I think. And the other times are like a few 2 star 3 star, but what is the rarity percentage of getting 4 star??? Or am i just unlucky? Coz saving 300 is quite a feat. And even using the legendary scroll to lottery mouse, i still cant get 4 stars...