This guy seems pretty cool and I'd love to hear everyone's ideas and first impressions.
Let's ask ourselves this:
Why would you ever want to Oath this card up when cards like Griselbrand, Tidespout Tyrant, or Rune-Scarred Demon exist? These cards all have effects that are/can be activated immediately that have a much potentially game-ending effect than this.
Why would you ever want to Dread Return this card in Dredge? When you cast Dread Return, I should just be dead. period. this card is only slightly better than Squire to Dread Return.
Is there really ever a reason to play this when you can play Spirit Monger?
Now, it may be playable in Legacy Lands as a 5 Casting Cost finisher, but overall, I'd be shocked if this card is playable.
The reason you can consider Oath is that it is also castable without Oath in a pinch (just like how Salvagers was used in an Oath shell). However, at that point we have Salvagers. You'll have to consider why the ability to hardcast this would be good while keeping the option to Oath.
@Lodestone I'm not convinced that it's a good finisher. I'd rather just play things with Flash in a Landstill Shell. Vendilion Clique and Snapcaster.
You don't need a big flashy guy to get cast. If it was BUG Landstill, I'd rather have Prophit of Cruphix since he at least untaps my lands (attack with manlands and still be able to cast counters etc) and it is pitchable to Force of Will.