We've got another big creature here, the Force of Nature , who's a mighty 8/8 with Trample -- a much more deserving statline than the mammoth
There are a few different ways they have been sealed, the most common are short seal and long-sealed booster packs, while seals for hanging racks were less common
However, its likely the reported change in totals from year to year is now accurate
What I did do was draft a pretty sweet Simic deck while I was there, which inspired me to do another Top 8 [Guild] Cards list
Another thing to consider when adding creatures is what your instants and sorceries do
I tossed in tons of artifacts, enchantments, and creatures that counted as one or the other, like Esper Sentinel and Agent of Erebos