Last and least, you get the itty-bitty text just above the border which says "135/306" meaning the Troll is card number 135 out of the 306 cards in Mirrodin
It even shuffles, so you could get the other cards if you like
The first thing that I noticed about Decaying Time Loop is how nicely it works with Life from the Loam , allowing you to dredge a lot and always making sure that you have access to key lands from your graveyard
Saproling Infestation is the first creature token trigger based on the use of a mechanic (in this case, kicker)
Collector treatments such as retro frames and concept Eldrazi add visual weight for players who love showing off their decks
I can provide some handy links to bookmark so you can check back in, but for now, your best chance of securing anything will be via the most trusted third-party resellers like TCGPlayer