I opened a pack out of my box at the store today, and the cashier, who plays Magic competitively as well, could only say that Dawntreader Elk was "interesting". He usually calls everything garbage, so I figured I'd ask for other opinions.
I'd like to see if the interaction with Dawntreader and Caravan Vigil can ever work in the competitive world.
So, just let me know if you've tested or played with these cards. It can be Wolf Run or MonoG Ramp/Beats or your own homebrew. I'd like to hear about the experiences with these cards. I guess they're new ramp toys and I'd like to see what I can do with them.
I can't speak for the werewolf, but I like the elk. Following the prerelease I've been messing around with a GB morbid/undying deck. It's nothing I intend to be competitive, but it has had some fun moments. Rampant growth on a body is okay, I guess, but having morbid on demand makes it worth it imo. Like you mentioned, Caravan Vigil grabs you another land. Tragic Slip is great with it as well.
My deck focused on ramping to Mikaeus, the Unhallowed and then combining sacrifice effects with undying for "free" +1 +1 counters and morbid. The elk is probably one of the most important cards in there, as it provides a lot of versatility.