how many "Mini icons" are there?

the store display shows 8. but is it limited to those 8 or are those just examples? i want a veigar, nasus and sion icon. if i have enough dust, is it worth it to just hit that lotto till i get them?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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