If you've been paying attention to Magic: The Gathering price movements over the past week, it's pretty obvious what must be causing fluctuations for this card, which came out in 2023 in the March of the Machine MTG set
I printed it the same day
Boast and foretell are the latest in a string of very cool keywords WotC have come up with recently, and are worth examining in detail before we sit down to start seriously predicting and brewing for a post- Kaldheim meta
You can constantly remove the second counter from The Eldest Reborn to force your opponents to discard a card on every one of your turns, turn Binding the Old Gods into a repeatable Maelstrom Pulse each turn, or get a steady stream of card draw or +1/+1 counters from The First Iroan Games
The first is a 4/4 that, when it deals combat damage to a force, you can get an extra attack step, and 4/4 for five mana is fine
There are 35 of the former, and 14 of the latter, so the most intuitive way to print them on one sheet would be for 47 of these 49 cards to be printed twice and the remaining two 3 times on a 10x10 sheet