kuriboh yugioh card » Astral (Ultimate Rare) This is of Super Rare rarity Rainbow Kuriboh (SR01-EN022) | Black

Now let's look at the top

The experimentation I can see going here is to have A1-089 as a damage dealer instead of A1-129, but that probably requires too many additional cards

Under the current rules (as of writing this blog post) both of them would simply die as a state-based action due to the planeswalker uniqueness rule, so nothing special happens

If so, this version of Volcanion-EX would certainly qualify as an alternate-art card

I get that drawing the extra cards from spells like Brainstorm can easily be preferred, but do not underestimate the advantage looking at your top 5 can give you

Pest Summoning easily tops the list of Strixhavens cutest lessons