While this may be relevant if you, I dont know, intend to use them to make a cube, or for every single deck you have, it's more than the average player would use
If that creatures power is 2 or less, you also get to draw a card
On top of that, you can absolutely pay 0 for x and wipe all artifacts with a mana value of zero, which seems ever more relevant with this years increase in Clue, Food, Map and Treasure tokens
These characteristics play a huge part in its high value and collectability level
While we do an average of about ten damage, we would much rather have a card that does a guaranteed ten damage since the 21st point of damage is worth way less than the twentieth and almost all of the 1000 damage is pretty silly overkill
This limited-time window for the cards is in place in accordance with the placement of two other events