Are there any effects that use the Kruskal count?

There are quite a few, some of which I mentioned in my Last To Be Chosen blog post about 2.5 years ago.

Most of the routines I've seen use either playing cards (predict the last playing card in a spelling sequence), or text (choose a word, spell it, then spell the word on which you land, repat until end of paragraph).

Thanks Scott I will have a look