Rallygren!

Basic grenadin deck with lots of refill.
This is a meme deck filled with cards and combos I think are fun. So probably juuuuusssst under a Tier-1 deck.

Main combo you're searching for is: Rally + a board full of chump blockers.
Add in Blood Quill and you get huge sustain out of nowhere.

Flamestoker and Red Canyon Smuggler are great targets for the combo.

Scraptank is mainly here as a 'summon' 3, but incidentally becomes a win-condition if ignored.

Gearcruncher refills your board if there's a wipe -- which you should expect.

Slimespitter Slug is never played and probably objectively bad (but it's my favorite card) though here it's a good answer since you have a huge board (usually) and no flyers.
Similarly, Mob Rule is usually pretty effective.

The market is a little thrown together. Bloodrite Kalis is sometimes amazing but hard to bank on with all the relic hate going around. Rallying Banner is the point of the deck and should maybe be 4-of in the main deck but I like that it's searchable. Deepforged Plate is super good, but maybe a win-more by the time you would use it. Voprex, the Great Ruin is also potentially game winning, but could easily be replaced by something else.

As I said, not optimized at all, but works well against gauntlet while I test it out.