In regard to the Investment of the Chain Master’s DC replacement and the Sprite’s poisin… Would the sleep effect still only happen on 5, or would you allow sleep on DC-5, or DC/2? The invocation doesn't change anything in the sprite's text. By a strict read, it still requires the save result to be 5 or less.
I wouldn't be surprised to see lots of DMs rule that to work more like drow poison, though, where if the save fails by 5 or more.
— Dan Dillon 👥 (@Dan_Dillon_1) November 6, 2019