Spikeshell Harrier is Aetherdrift s only way to reduce an opponent's speed, and it works on the player with the most speed
While it's not listed as a reward, based on the illustration contests the company has run in the past, we'd also be shocked if your art isn't stuck on a real life Pokmon card too
There are many combo options for Helm of the Host
Jidoor, Aristocratic Capital has an ability that mills half a players library tacked to an adventure, and if you have some ways to return lands from the battlefield to your hand, you can make a pretty good combo (Fear of Isolation, Kor Skyfisher)
Cathartic Pyre 2 Looks good but is actually poor
The only thing holding these back is that theyre essentially sideboard cards, albeit really good ones situationally