They carry the same basic land subtypes, they work with all your fetch lands, and they can be had for under $100 each
There are, however, two things you should know about the back faces of these cards
Damage during shipping is an easy way to ruin your reputation, so use protection
Feel free to disregard the Core Set card in the middle
Myrels first line of text defends your board on your turn, which helps line up a win with a card like Moonshaker Cavalry or get guaranteed value off cards like Mondrak, Glory Dominus and Cathars' Crusade
Raphael, the Nightwatcher I'm sneaking Blade Historian in for one less mana which is a huge difference, as is the element of surprise