Channeler will have to attack every turn once Delirious, but this isnt much of an issue for tempo decks like Legacy Izzet Delver that are trying to end the game relatively fast
Well have Sealed product ready to go when the preorder starts, with Singles available soon after the start of Previews
Inkshield Inkshield has been the subject of more than a few EDH memes, but the card has real potential so long as your deck can hold up 5 mana without seeming suspicious
So, if can consistently get a hit with this ETB, its going to be plenty good
Even if you dont think about Harnessing it, this is more than enough to make this card playable
The best discard commanders are the ones that turn it into something beneficial, although its not always just you or your opponent whos throwing away their hand