Nice to see an Affinity list there, though it's a little odd. Alot of the decks seem to have weird card choices if you ask me. What did you lost to for you to wind up in 8th?
The Affinity list was played by a friend of mine, and since I forgot some of the cards he played it a little suboptimal..
I have a QnD report:
Round 1 against straight burn.
Game 1, I drop a 5/5 Terravore and set up a Confinement. He tries to burn me out in response but I have the Plow for my own 'Vore.
Game 2, I get burned out on like turn 3. He had Spike, Spike, Bolt, Chain, Rift Bolt, Lava Dart, Fireblast on me.
Game 3, I kill him on turn 3. Well, not really, but I have the Confinement.
Round 2 against Mono White Staxx
Game 1, I get slaughtered. I saw an Ancient Tomb he dropped during shuffling and I put him on Faerie Stompy. I keep a hand with 3 fetch and he drops a turn 1 Suppression Field and Wastes some of my land, after a 3Sphere. He said that he metagamed the Fields against me, hehe.
Game 2, I drop a Vore, Grip a Crucible and win with the 'Vore and a Monestary
Game 3, I have a 4/4 Bear, a Null Rod, a 4/4 Terravore and 2 lands in play. He drops a Ghostly Prison after a Smokestack and I Grip Prison, thinking I could kill him with the land + Rod in my hand to ditch to Stack. He has double Wasteland on me and I lose my board. He plays a topdecked Angel and I can't find a land (for my StP) to save my life.
Round 3 against Spring Tide
Game 1, I get slaughtered. He counters my Armageddon and wins.
Game 2, I Chant in response to a Meditate with 'Vore on the table. He FoW's. I Chant again, and win.
Game 3, I have the turn 1 Elf, turn 2 Mongrel, turn 3 Terravore and turn 4 Chant into Armageddon. Chant absolutely saved my life.
Round 4 against Mono B
Game 1, I get to like 2 life but I have a Loam online and a Monestary. I am vulnerable for a single turn, but he doesn't draw the Wasteland / Sinkhole and I draw 4 cards a turn, into Fatz.
Game 2, I plow a Wretch or two and double Mongrel takes it home after I 'Geddon for all of his land while he only has Nantoku Shade.
Round 5 against Iggy Pop
Game 1, he opens with Leyline. Turn 1 Elf, some cycle into a turn 3 Terravore (a 2/2, because of his Fetch..). He sets up for a turn 4 kill, but I have Armageddon to wreck him. He was forced to Intuition for lands, making Terravore 7/7, taking it home in just 2 turns.
Game 2, he opens with double Leyline. I play an Elf and a Mongrel, and sit on a Chant after a Null Rod. I resp to Ritual-Ritual with Chant and he burns for 5. I cycle into another Chant and win shortly there after.
We play some other games and I won 3 of them, losing 2. Chant is so good here..
In the t8 I played against Grunt Pikula (the Descendant version). This guy also metagamed against me 

, as his friend is Wim Helder, who made t8 at the Dutch Open Legacy Champs and lost to me twice, so they tested this match extensively 

. I won game 1 with a quick Terravore but lost game 2-3 on too much GY hate combined with Darkblasts 

 I mean, 4 Grunts and 4 Wretches? 

Greetz,
Hugo