Its obscene before factoring in cards that increase the number of counters distributed or other ways to pump the snake
To its credit, Wizards own client is very, very generous with its starter decks, which makes it an easy recommendation to anyone new to Magic, especially when paired with a solid tutorial
Playing a full complement of Madame Medusa - The Boss is also a clear nod to the Castle plan, because you do not care about her low Lore value compared to other options like last season's staple, Lady Tremaine - Imperious Queen
This card was designed to allow an Enchantress deck to exist without creatures (green oddly enough has this quirky creatureless side that shows up from time to time)
These are usually splashier, stronger, more efficient, and/or more unique
Legality depends on the tournament format -- Earth Kingdom Protectors can be legal in some formats and banned or restricted in others