OLL 12
Small lightning bolt · 4 of 9 top stickers yellow
M' R' U' R U' R' U2 R U' M10 moves · Probability 1/54 · Mirror: OLL 11

Setup: apply these moves to a solved cube to reach this case
M' U R' U2 R U R' U R MSmall lightning bolt · 4 of 9 top stickers yellow
M' R' U' R U' R' U2 R U' M10 moves · Probability 1/54 · Mirror: OLL 11

M' U R' U2 R U R' U R M