-1Red skulls
-1White skulls
1Stack size
Grades and variants
Surgeon's Error (Skin)Skin operation: fewer than 3 of its 6 ticks succeed
Surgeon's Error (Bones)Bones operation: fewer than 4 of its 8 ticks succeed
Surgeon's Error (Skull)Skull operation: fewer than 5 of its 10 ticks succeed
Surgeon's Error (Guts)Guts operation: fewer than 6 of its 12 ticks succeed
Surgeon's Error (Brain)Brain operation: fewer than 7 of its 14 ticks succeed
Surgeon's Error (Heart)Heart operation: fewer than 6 of its 12 ticks succeed