A two-mana 2/2 that can grow and forces an opponent to pay three life if they want to kill it is quite the aggressive beater
This prevented certain strategies and playstyles outside of their corresponding colors while keeping eldrazi colorless, mechanically and lore-wise
The Sun god has long been associated with justice and righteous action, and whats more, there is a shield in Sls chariot to protect the realm below from the sheer fiery power of the Sun
Theyre included because they either provide any color of mana or work well with playing lands, which is what youre all about here
Either way is pretty good from where I am sitting, card flow or goading to screw up the table and then get in another set of goads to form more and more attacks on an untapped battlefield
The same generally applies to graveyard hate, though it is more respected overall