If you cant answer, the card is either cuttable or its a pet card
Theres also a fair amount of deck manipulation in here, which makes sense considering you need to be able to make sure you hit those enchantments regularly
Any creature becomes a threat with Fynn out, and even one poison counter on your opponent can be deadly thanks to any number of proliferation effects
Meanwhile, Yennett, Cryptic Sovereign is one of the most interesting build-around commanders in the set, facilitating a brand-new archetype in odd-converted-mana-cost tribal (while still being fine on its own, with the double evasion making it pretty easy to draw an extra card each turn if you can't cast that card for free), while Varina, Lich Queen finally unites all of the colors of Zombies, so if you are looking to add the white Amonkhet Zombies to the blue Innistrad Zombies on the traditional black Zombie base, she's the best (and only on-tribe) option for your commander
However, there are decks like Merfolk Tribal that are going to play a ton of Islands anyways
Llanowar Elves is one of the most famous cards in all of Magic, and one of the most fundamental