OLL 18 algorithm: Crown
OLL (orient the last layer). Group: Dot (no edges oriented).
OLL 18, Crown: yellow stickers on the top face: back-right corner, centre, front-right corner. Yellow stickers on the sides: back face, centre, right face, middle, front face, centre, left face, back, left face, middle, left face, front.
The diagram shows the cube from above with the front at the bottom and yellow on top.
Algorithm
R U2 R2 F R F' U2 M' U R U' r'
12 moves.
Other algorithms
r U R' U R U2 r2 U' R U' R' U2 rR D r' U' r D' R' U' R2 F R F' Ry R U2 R' R' F R F' U2 M' U R U' r'
Source: www.speedsolving.com