arena deck not functioning

[irraka]

I have an arena deck that no matter the upgrades I do in health it allways have 1 hp. I have encountered many arena decks that also have only 1 hp. why does this happen?

[dawn to dusk]

The one hp means it is a deck that is at a particular age. The amount of hp depends on how long it takes and if you want to see the full table, scroll over the question mark next to age. But it really is at 1 day, it looses 1 life 2 days, 2 life, 3, 4 life and so on. By doubling each time, it means that one deck can not stay in the top position for too long. Hope this helped. 

[Hazardus10]

I have an arena deck that no matter the upgrades I do in health it allways have 1 hp. I have encountered many arena decks that also have only 1 hp. why does this happen?

Depending on the age of the deck, the Hp of the deck decreases. If you scroll your mouse over the age section, it will tell you the loss of HP per day.