The game of Morra (aka Odds and Evens) is pure luck. Not this puzzle!

A weather event has scattered given digits willy-nilly, but it could be that their distribution offers clues about the nature of the Renban lines. Perhaps.

I'm glad I'm not a fish, trying to navigate this puzzle full of hooks! Each of these Renban lines are six cells long.

They’re Quadruples even when they don’t contain four digits, because they still give information about four cells. Right? Let’s go with that. These Quadruples clues contain only one or two digits, but to make up for that, I’ve put a quadruple of Quadruples into each 3x3 box. With 36 Quadruples clues, I think they don’t really need more digits.

I think we're a clone now. Us and Mickey 17, or any number of storm troopers. Or the delightful chip off the old Wolverine block in Logan, X-23.

You can get really far into this puzzle without relying on the negative constraint, perhaps just long enough to forget it’s there.

Just ignore the title as you solve the puzzle. It wouldn’t be fair to use the title as part of a logical deduction. You shouldn’t need it anyway.

I’ve heard that good fences make good neighbors, so I’ve put a small (virtual) fence between every orthogonally-connected pair of cells.

It is admittedly harder to explain how Sudoku doesn’t actually have anything to do with arithmetic when there are variants like this one which do. And this one has a lot of arithmetic.

In Japan the puzzles (not this one) are “Samunamupure” but a UK newspaper decided adding arithmetic to Sudoku made it a “killer,” and the “Killer Sudoku” name stuck. We call them “Killer Cages” three decades later. No cages in this puzzle, but each tiny arrow defines a “virtual cage,” so it’s a “Little Killer” puzzle. I don’t choose the names!