Cheap, on curve, flying, and gives you powerful card advantage options if you can find instants and sorceries that can target your stuff
The order builder: list, search, sets The Order page is clearly designed around the three real ways people build proxy orders: List: you already have a decklist, you just want it printed Search: you know the card name, you want it fast Sets: youre browsing and building as you go That triad sounds small, but it removes a ton of friction
Also, if youre doing Ashnods Altar shenanigans, youll likely net a bunch of extra mana for your finishing move
Just remember that means you are committing to casting that Phyrexian Missionary for 2 mana if you dont have anything else on turn 2 as a 2/3 lifelink is a pretty decent creature
Wait, sorry, that fact was about mongooses