Without extensive testing, I went to Game Day in the hopes of getting that sweet Glorybringer Promo. (It looks so nice)
Match 1: VS Red/White Control (Won 2-1)
Round 1: I got defeated as everything got countered and he beat me using a Torrential Gearhulk.
Round 2: Boarded in Serpopard and Hydra. I was able to quickly develop an early boardstate using serpopard and swinging in with Glorybringer, Gideon and Gisela. (Gideon Ally of Zendikar is so goods, hard to believe)
Round 3: We both mulled to 5. Which is great for me as control really needs its cards. I was again able to swing using Glorybringer and Gisela.
Match 2: VS Red/Blue Emerge (Won 2-0)
Round 1 & 2: These matches were mostly a bunch of luck as he only drew land and no Elder-deep fiends and the like. Round 2 was even worse for him. So a won (which is great for me) but not a real test of skills for my deck.
Match 3: VS Black/Green Constrictor Aggro (Lost 1-2)
In all rounds, This deck was too fast for me. I quickly lost a lot of life while having nearly nothing on board. Fumigates helped to slow him down A LOT but sadly, my deck is too slow for aggro-ish decks.
Match 4: VS Red/Black Madness (Draw 1-1)
Round 1: I won using Gideon and Nahiri. While the match was slow, his graveyard got depleted and I could swing in the air with some angels. Thalia sure slowed down those "sudden" blockers.
Round 2: my hand was horrible and slow and I got defeated by a Voldaren Pariah. I also made some misplays which also quickly made me lose.
Round 3: A draw. I started aggressive and used many planeswalkers like Gideon, Nahiri and Ajani. he used his graveyard to get creatures back but due to the slowness of the match and the fact that I could not do enough damage within the timelimit, we had a draw. I believe (but could always be wrong) that if we had more time, I would be able to defeat him this round.
I placed 3rd this Game Day and got my Promo (hurray!) and I am really happy that this brew worked well enough.