Assuming you're not a 5-color deck with a stringent mana base requirement, the only reason I see not to run Arena of Glory is that all your creatures already have haste
It comes from the original Innistrad set and costs only one red mana
Orcish Bowmasters Orcish Bowmasters is quite the boogeyman, designed to punish opponents trying to draw a billion cards with equally busted effects like The One Ring and Up the Beanstalk
Underground is one of those resources, and understanding the Pokmon Trading Card Game Online is another huge step in my opinion
While buying your first packs or cards, always remember to get some card sleeves, they are basically a small plastic pouch for your cards and save your cards from getting scratches all over it and without the sleeve, any card can get easily damaged and that will bring down the value of your card
And if you keep removing the lore counters you get to keep your saga creature around for blocking or attacking