Its user interface, and its a really good one
It's best to just play Simic as landfall, and in some cases, it is a better landfall archetype than the advertised Gruul landfall archetype .
Boromir, Warden of the Tower Marcy: Stax on Stax on Stax, baby
If these two arent your flavor, swap them out for the literal elfball in Abomination of Llanowar and you still have a GB Elves commander that cares about Elves specifically and still enables aristocrat shenanigans
One way to do multicolor cards is to find an overlap between the two colors and push the power of the cards with the idea that if you spend both colors that can do the effect, you get something stronger than any one color could get
Its enabled by artifacts, and its a huge payoff for playing artifacts later on, and the turns when you play an artifact land and attack with your 8/8 unblockable creature are very strong