Intransitive dice are numbered so there is always a better and a worse dice to choose. It is like the “rock, paper, scissor” game but each represented as a dice. Like rock sometimes punches paper but on average it gets wrapped. As sometimes the scissor splinters the rock or paper slides between the blades.

So these are Miwin's dice.

III wins against IV, IV against V, and V against III. 

miwin.com but here i made my own arrangement of dice eyes for the numbers for each set.

The eyes are in a 3×3 matrix while the original uses a mix with a non conform polar arrangement.

There is also a normal D6 to fit the Set and a special one (UB) where opposing sides Σ10.

Also a normal D6 in polar design. 

And you have the scad customizer in case you want a dice with sixes on all sides.