Bite Down is a straightforward bite effect, letting your creatures serve as removal
Bronze Guardian also comes with the upside of being a brutal attacker since its power matches the total number of artifacts you have out, and if that wasnt enough, it has double strike too
Lastly, Planar Portal is a deck that exiles creatures to bring them back into play later in the game, creating a large and hopefully devastating board presence
On the flipside, if your key engine costs a ton of mana, like Kozilek, the Great Distortion, a big beefy ramp card like Thran Dynamo will get Kozilek out much earlier than a Mind Stone
I could probably go a lot further in breaking down such a flexible archetype, one which can tie into so many other powerful mechanics
But behind the mask, Sita is the wealthy daughter of an old Consulate member, a secret she guards closely