This looks fine if you never craft it, and really strong if you do Playing an artifact creature to trigger this is best, because then you can guarantee that the Haste part matters, so you get the most value
You just dont have enough things to spend mana on in Limited for this land to be that good when you transform it in the mid-to-late game Another amazing flavor design, but probably terrible
When Unidentified Hovership leaves the battlefield, the exiled card's owner manifests dread
Most of that comes from playing about 30 high-quality rare/mythic creatures, but there are plenty of cuts along the way to help ease the pain of buying so many singles
You're building an impenetrable wall that also swings for lethal
Helm of the Host | Illustration by Igor Kieryluk Infinite combat combos let you take an unlimited number of combat phases during a single turn