After a few days of battles, making constant edits and changes to my Mono White Deck I managed to take it to Level 40. Here's my build for those of you still interested in the game.

Creatures:

1 Kytheon, Hero of Akros

2 Expedition Envoy

4 Suntail Hawk

2 Cliffside Lookout

2 Knight of the White Orchid

3 Consul's Lieutenant

2 Kor Bladewhirl

4 Topan Freeblade

2 Blessed Spirits

4 Heliod's Pilgrim

2 Kytheon's Irregulars

Enchantments:

4 Nimbus Wings

1 Angelic Destiny

3 Suppression Bonds

Instants:

2 Reprisal

Lands:

22 Plains

Was having very little success for quite a while, then once I got Angelic Destiny my wins skyrocketed. Turns out being able to be searched by Heliod's Pilgrim does a lot for the deck, and I've lost track how much times it won me games. Suppression Bonds is also pretty good, stopping Planeswalkers is a huge deal and that's something the other spells can't do. Everything else here is from Magic Origins and the deck was built up as I got more and more of that set. The deck basically seeks to use its fliers to poke for damage, stop blockers with Suppression Bonds or Kytheon's Irregulars and basically cheese a lot of wins. Any suggestions are appreciated, and feel free to copy the build for your own climb.

(Formatted w/ card links)

How are you obtaining new cards? Isn’t the store closed?

The best mono white deck I played was Zerris’ Face is the Place
viewtopic.php?f=52&t=10291&start=100#p475721

IIRC the only change I made to it was -2 Relic Seeker, +2 Glory-Bound Initiate. Initiate is *way* better, but Arena didn’t have that set when Zerris posted the build. It likes to win on T5; if you’re on the draw and opp doesn’t have a sweeper, it’s tough to beat. The demon land gives the deck game if opp is able to stabilize and drag it past T5.

I started playing again, and I think there was a pop-up when I logged in that said that all cards are now unlocked

Playing any interesting decks?