As I mentioned before, things are more complicated than this when you consider cantrips, card advantage, and such, but this should give you a good start for making sure you have the right number of lands in your deck
Starfall Invocation Starfall Invocation is slightly more expensive than other sweepers, but the potential to keep your key creature is great, especially if you elect to let your voltron commander go to the graveyard
you can only have so many Farewells and Merciless Evictions at a table, and people even run out of Swords to Plowshares
it can be done, but it's more difficult to construct a viable mono-color deck than multi-colored decks
Boros Aggro where this is an on-curve option to removal in the creature that can mix it up and go wide with copies too
These are two foil uncommons from the set, in a normal frame, that aren't legendary