So, if can consistently get a hit with this ETB, its going to be plenty good
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
Silumgar, the Drifting Death
Even if you dont think about Harnessing it, this is more than enough to make this card playable
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
Since the board state tends to stall out there will be lots of chances for your opponent to play a load of land and then untap a creature with Outlast and then use the Singing Bell Strike to effectively Outlast the creature numerous times on the same turn, provided they have the mana