What follows below is a stream of thought to help me develop the deck:
What is this meant to be?
Basking Broodscale can kickstart the combo itself if you have the mana.
You need to have Blade of the Bloodchief out already. Then cast the broodscale. Then attach the blade for 1. Then pay the adapt cost to get a counter and make a token. Then sac it. You'll need a win con in hand or a way to get to it once the mana is made.
So we need access to 5 mana to cast this combo assuming we already played the blade on a prior turn.
So mana ramp of sorts is essential to pull this off by turn 3.
So this means using grazer and utopia sprawl. And because of that we're firmly in the mono green range. This puts us out of meaningful reactions like counterspell. So we need to protect the combo. This requires Cavern of Souls. Which with Utopia Sprawl both act as mana fixing too. So this allows us to lightly splash a playset of another color if needed or preferred.
The most efficient "tutor" we have to look for both of our combo pieces is Ancient Stirrings. This also allows us to find land if needed. And we still don't have a win con. The win condition should be synergistic and capable of standing on its own or enabling a plan b of sorts on its own. I keep coming back to Glaring Fleshraker for this. It takes advantage of the temples. It can be found with ancient stirrings. You can enable the combo by playing the blade out while fleshraker is on the field. Seems a good fit.
From this point I feel like the rest of the deck is up in the air. How you want to tweak it is up to you. You have the core of it. You could lean into the enabling of fleshraker as a stand alone adding x costed creatures that are colorless to trigger both of its abilities for free. This would also enable plays where you equip fleshraker with the blade and play x for 0 creatures and pump your fleshraker up. With the deaths of the x cost creatures and saccing the tokens to get another boost.
Also a backup plan for broodscale would be cool too. Something to let it just attack right away maybe. Idk.
Honestly it's probably best to use the remaining slots for a plan b that also somehow enables plan a. But what...
I believe that leaning into fleshraker is the best course of action.
If I understand the sequence correctly. We should be able to deal two damage each time we would play an x costed creature for free. It would make a token and enter. Triggering the second ability twice. I'm fairly certain that is correct but please correct me if I'm wrong.
Urzas Saga seems well suited. Yes it allows us to tutor for the blade. But it enables fleshraker too. It feels like a good fit. With that perhaps I'll add Shadowspear too as an additional back up plan.
The sideboard is under construction lol.