Thalia, Guardian of Thraben might be the most important card to the deck, so trying to play without it is a risky strategy
It would certainly seem some bright, forward-thinking people set the system up that way.) As a Siege battle enters the battlefield, its controller chooses an opponent to be its protector
Section 20 Summary Input: Goblin Burrows entering the battlefield Output: Lots of reuse of Goblin Clearcutter Layer count: For each Clash of Realities, for each Guilty Conscience, for each Rite of Passage putting counters, for each Doubling Season on the Rite of Passage counters, for each Rings of Brighthearth on Sinking Feeling's ability, for each Rings of Brighthearth on Goblin Burrows' ability, for each Grip of Chaos, for each Psychic Battle...9
Ajani, Nacatl Pariah giving you two creatures for 2 mana is already pretty solid, and I appreciate that transforming this card is both easy and flavorful
For comparison, take Broken Concentration
You can check out the most recent precon decks from Midnight Hunt or Adventures in the Forgotten Realms