The cards have new artwork, but are based on existing cards in terms of gameplay functionality, so you can expect to use them in competitive play, so long as the original card is still in the standard rotation
You exile each permanent with the most (or tied for the most) votes, but it never explicitly says that youre targeting these permanents
Metadata In 924 decks according to EDHREC
And not only does Messenger Hawk get a bonus when you draw a second card
I encourage you to poke around with the websites search feature and see if you can learn anything interesting about your local Magic scene
Partner (You can have two commanders if both have partner.) : Until end of turn, target land you control becomes a 1/1 Elemental creature with vigilance, indestructible, and haste