So, the set needed a common green pump spell. Usually that type of spell will boost a creature until end of turn between +2/+2 and +4/+4. As this was an
Un- set, I wanted to find a variable to care about that would average in that range. It took a little searching, but I finally found one: words on the type line. Most creatures have the creature card type and then one to three creature subtypes. This worked perfectly. I made the card early in design, and it stayed untouched for a long time.
Flash forward to the conversation about Eternal versus acorn. While we had never counted supertypes, types, and subtypes on a card before, there was nothing about it that the rules couldn't handle. However, the problem came from play design. Most cards only have a handful of words on their type line, but there was one exception. The changeling mechanic (from
Lorwyn) had every creature type. The mechanic has been used a few times and is on over 50 cards. Embiggen plus changeling meant enough damage to instantly kill any player in any format. That combination would mean having to make this an acorn card.
I asked, "What if I could tweak the card such that we avoided that combination?" The issue was that I had to do it in a way that didn't add a lot of words to the card. It would be better to have a clean acorn version of the card than a convoluted Eternal version. The design team was fine with this being an acorn card, but I had faith that there was a clean answer. After much thought, I found an answer that only involved adding one word to the template. If we targeted a non-[any creature type], then it would hit almost all creatures save Shapeshifters and that one named creature type. But what should that creature type be?
As this is an
Un- set, my goal was to have it be the funniest option. What creature type could we reference that would make people smile when they read it even if they didn't understand right away why it was there? My first suggestion was Brushwagg.
Brushwagg had originally shown up in
Mirage and had taken on a meme status among the
Magic community as a silly one-of creature type, so much so, that we ended up making a second Brushwagg in
Ikoria: Lair of Behemoths. We talked through many other options but kept coming back to Brushwagg until finally we gave up searching. Brushwagg it is! There's also a sticker that needed the same trick, so we used Brushwagg for that as well. Had this problem happened early enough that we could have made art for it, my gut says we would have put a Brushwagg in the set. And that is why Embiggen says "non-Brushwagg."