Sealed mode has been available for some time. Although it changed recently due to ToF and set rotation, and it is very pricey to play now, I would like to share my old 7 win sealed play before ToF.
Win 1
3 Mana
I play Jason for future benefits. My opponent kills Boar.
4 Mana
I clear board with GP+attack. Them playing Canopy is sad but it is also waste.
5 Mana
I play Shady Merchant for Value and also GP. Here they go wide with more creatures.
5.5 Mana
I get Blitz relic which is good. I clear their board. My opponent plays Flame-Touched Paladin.
6 Mana
There is not really a good answer, so I just play my Frontliner.
6.5 Mana
I spend some time, but I finally use Sleep+Hidden to clear their Paladin. I also get a free card.
7 Mana
Here Pixlelock almost made me to play Circe but they damaged it so I play more cheap Carnage Sweep.
7.3 Mana
I was originally going to play Gama+face to steal 2, but it wasn't really tempting. I instead play Screams in the Night and kill their board. Unfortunately our Shrine Moonlighter is killed.
7.6 Mana
I draw one of the nethers from Raze Imp, which is really good. My opponent plays Are's Runeblade which is really going to be harmful.
8 Mana
I play Winter's bounty to heal up.
8.25 Mana
I could've use Kadmos but I use relic+Shadow Stash+GP to kill That Which Aches. They play and buff a creature which makes it to 12/4
8.5 Mana
I bounce that 12/4. My opponent kills my Merry Kadmos
8.75 Mana
Here Gama steals Compost Charm which is a good card, so I play it.
9 Mana
I steal compost charm and play it. The extra card enables me to kill the hidden creature.
9 Mana~
They play 12/4 again which is easily killed by my board wipe. GG!
Win 2
Somehow I can't watch the video, so there's no commentary.
Win 3
Somehow I can't watch the video, so there's no commentary. It was super close though!
Win 4
Mulligan/1 Mana
I start with some great low-cost cards. I play my 1 mana creature.
2 Mana
I further develop my board with Loam Strider.
3 Mana
Mottled Ranger allows me to delve a nature card. The choices aren't really great. They CTI my Hippotaya.
4 Mana
Here, Moon Gazed Cyclops becomes a 5/5. But it is hit by Canopy Barrage.
5 Mana
All 3 Mana creatures! I play Magmarer and go face. It is removed by FotS though.
5.5 Mana
Here I play Jason first because it would get the value later. I rush face.
6 Mana
I play Shady Merchant. Loam Strider with Regen 2 makes removal easy. I also get wide with my chicken. My Loam Strider is removed quickly, though.
6.5 Mana
Here I just go All-in... It could've been a mistake but I got the habits of an aggro deck. Luckily no board wipes!
7 Mana
Iron Horse is tricky to remove with 5/5 protected ward with more anim. But I clear it with my board. Here Keya kills my board.
7.3 Mana
Reject Dogma could've killed Keya but I instead chooses to use relic. I foresee some good cards though.
7.6 Mana
Pickpocket gets Keya and Compost Charm! I play compost charm and also draws 1 more card.
8 Mana
They clear it but that means they also wasted a 6 face damage spell which is good. I play my Frontliner and deadly relic. My opponent goes wide.
8.25 Mana
Grendel is a really GOOD top deck and I clear the board pretty easily.
8.5 Mana
Seasonal Rebirth kills it but it is kind of wasted. I play Keya which goes face for 8. It gets removed pretty easily, but they has only 11 health.
8.75 Mana
Shadow Stash foresee?s summoning 3/3 spell, so I hold onto my Circe.
9 Mana
Circe is tempting but I clear board the other way.
9 Mana~
GG!
Win 5
Mulligan/1 Mana
Nice mulligan, nothing to do so I play Raze Imp. My opponent plays a strong frontliner.
2 Mana
I could have played Canopy+ Attack, but it felt wasting a 4 dmg to a creature with 1 strength and can't attack... I just GP and go face.
3 Mana
I get to play a Mottled Ranger, and I get a decent card with 2 armor.
4 Mana
Dart Maniac + GP + attack almost clears their board which seems like a good line. Sadly they change it to 3/4 with ward which is annoying.
5 Mana
Not sure what I need to do so I hid my Dart guy and used GP. Lethal prowler deals me +5 damage which is critical.
5.5 Mana
There were some lines that I could play, but I pip here and play the 4/5 Blitzer. It does trade horribly wit 5/5, but it can't really attack without another one. I feel Reap here could've been a waste? for my opponent, but that also feels good.
6 Mana
Canopy+GP clears 5/5. I also play chicken to get the board.
6.5 Mana
Since he played his recursion, I also play hoping for getting more recursions by playing recursion??? Anyway, I get 2 Reaps, which is borderline playable. Shadow Stash here makes it a steady removal.
7 Mana
Here comes the sprouts. Circe here seems like a waste but I was worried for buffs like wildfire. I also get to foresee 3.
7.3 Mana
Here I decide not to trade. I already had 3 mana so hiding it felt more logical. Also if I trade with 2/2 it would die to their GP next turn. They waste a whole 6 dmg on the frontline which is good.
7.6 Mana
Snapping Turtle here. Armor 4 is hard to deal with(unless Lightning Strikes) and they don't have an answer.
8 Mana
I heal up and hide my Turtle. My opponent plays 6 mana AoE on 1 creature.
8.25 Mana
It's time for Jason! I could've chose Hippacria's Monster which was the best card since it was already 9 mana, but I didn't... I do chose Eris which is another fine 9-drop.
8.5 Mana
GP+Boar is better than just Reap here. I try to bait their another Canopy barrage that they got it from recursion.
8.75 Mana
Reap here is a strong answer, but I play Golem+ Shady Merchant to bait him to trade their to mine. However Hydra is a strong archer which removes my 5/5.
9 Mana
Deadly is great! I Reap their 6/6 and play the relic. Our merchant gets killed soon.
9 Mana~
Pickpocket here gives me some decent removals here. I also play Coronet, hoping for a 9 drop.
9 Mana~
Hi Eris! Too bad that they has a creature so I need to remove it. Their 4/7 is easily removed by Hydra+GP. They use Ray to destroy mine though.
9 Mana~
plays Eris online! GG.
Win 6
Mulligan/1 Mana
I get a fine mulligan. I draw an extra card.
2 Mana
I use Primal Guidance to clear their 3/2 and play my 1 mana creature. They go wide with Imps.
3 Mana
I try to clear with GP+attack. I also play my chicken. Warrior of Paradise is not great but they are killed by my GP.
4 Mana
I GP and play Rune Moth. I don't think it was a good play though, and I get a free rune. But, they go face which is really good for me.
5 Mana
I use GP and play Rune of Sight. I play my Frontliner, and I get a free rune again. They play Incoming Raid which is not good for me.
5.5 Mana
With my chicken and Reconnaissance, I am able to clear their deadly board. I also get take the reins which I have never used. Bifurcating Curse kills the board.
6 Mana
Winter's Bounty to heal up. They play 4/7 Twin strike which is a really big body. They also use the hunt to kill my board.
6.5 Mana
I go wide with Shrine Moonlighter+Raze Imp+ Magmarer, and I steal The Hunt. Turns out that they had another one, though.
7 Mana
Pickpocket allows me to have more The Hunt and I also get a free 2/2. But things are not looking great for me.
7.3 Mana
I use the Hunt here to clear the board. My opponent uses Scorched Seeker.
7.6 Mana
Jason is a nice topdeck! The choices were pretty straightforward. They skip the turn which is a nice tempo for me.
8 Mana
I gamble with Recursion and ends up not good. I develop my board. Here I have a slight lag but They skipped the turn with GP.
8.25 Mana
Set Oshi is great since I'm in 8 Mana. I get 2 Anims for free. They also had another Curse and they destroys the odd-numbered Anims.
8.5 Mana
Tutankhamun is an interesting top-deck though. I play it because I have enough board control. Take the Reins here is very critical, but My Tutankhamun somehow survives.
8.75 Mana
Nothing to do here. I play Underbush Boar. They also has another Winter's Bounty though.
9 Mana
Vampiric Skull is a great add by Raze Imp! I could have summoned Rune Moth but with Impfestication I chose Shirne Moonlighter. They play Bat's claw to attack my Moonlighter.
9 Mana~
Now Iron-tooth Goblin comes in play! I also play Hippolyta which comes as 6 mana 5/9. It's basically GG here.
Win 7
Mulligan/1 Mana
I hard mulligan and ends up great. 2/2 hidden is easily removed bu my underbush boar.
2 Mana
Here it feels like it is wasting removal, but I wanted to guarantee the boar going to face.
3 Mana
He blizzard bolts my 2/3 instead of 3/1 although it is on fire..? Anyway, Dart + GP clears the board.
4 Mana
Hunt Warden is easily removed by Shadow Stash. Being able to attack with 3/1 multiple times is really great.
5 Mana
That 4/3 Blitz goes to the 3/1 which is a huge advantage to me. Here I go wide. Using GP on Loam Strides buffs it by 1.
5.5 Mana
Inspirator is scary but with Hippolyta in hand it is easily removed.
6 Mana
Glass Cannon??? I think that was a misplay. Using 3 mana to destroy a 2/3 and give a plain 3/3 is not much helpful when you are losing.
And it's time for Rune Moth! I hide it to give it more safety even though it is already backline.
6.5 Mana
Shadow Stash is pretty slow now. I play my 3/4. My Rune Moth had stayed for 2 turns and it provided more value!
7 Mana
Unfortunately, Inferno wipes my board. I use Rune of Sight and play some creatures.
7.3 Mana
Blitz + Heal 3 is really good relic from merchant! I play it to remove their 2/2 and play Decaying Rhino and give it 2/2
7.6 Mana
Another Removal! But 3 health is easy to remove with relic+ GP. Here I delve nature card but they aren't really great. 2 mana creatures are weak but I don't want a single target removal 5/5 confused 7 mana creature.
8 Mana
Annnnnd of course it is Are's Runeblade! Knowing it could deal 2 damage, I only play some creatures.
8.25 Mana
Perfect top deck! wish it came sooner, but at least it prevents 8 more face dmg!
8.5 Mana
Witherfingers stall the board and it is GG.
Conclusion
I don't really play GU often nowadays due to ToF still not being patched. But I'm really hoping for new fresh meta!