I’ll throw in my 2-cents as a long time Lyonar player who has consistently reached high ranks with it across many different seasons.
This deck is pretty confusing to me. You’re running 3x afterblaze but not even Silverguard Knight? Silverguard Knight is one of the best 3’s in the game and your only 3 drop is Afterblaze which can’t even be played on an empty board. That means that there are many situations in early turns where you can be bricked on plays or waste mana if the opponent can steal or contest mana orbs.
Why are you running 2 decimate? Decimate is tech for something like Jax Truesight which Lyonar can struggle to deal with, but that card isn’t seeing much play at the moment so Decimate is awful. Especialyl in this type of deck where your minions will almost always be positioned to pressure the enemy general and his minions will corresponding be placed close by as well.
Suntide Maiden is also a fairly interesting choice, I’m not a huge fan of it personally but it isn’t the worst card ever I suppose. Normally I’d assume you aren’t running Kron due to dust shortage but this deck is absolutely filled to the brim with legendaries. Grandmaster Z’ir over Kron is a choice that is difficult to justify.
This deck has a lot of glaringly bad matchups as well. Your deck literally has no answer to things like Nimbus and can auto-lose to Dominate Will. It also has an extremely bad Vanar matchup with it’s weak early game and no dispels. Songhai is not looking too hot either with how late game heavy your deck is, and once again lack of dispels.
If I had to make a suggestion I’d say you really need to shift your power more to the mid-game or even early where Lyonar can shine. If you get into a late game slugfest with decks you will lose because they are simply better at it then you. Lyonar excels at aggressive mid-game pressure into game ending burst damage. Your deck looks like it would play more like a poor man’s vetruvian.