It can boost you in mana by a substantial amount if you can cast another ramp spell using the Dynamo mana, and its better evaluated along the lines of the Expertise cycle, or as a ritual of sorts
I am happy to try out Mask in Voltron decks and/or any deck where Good would be good in, like Hogaak, Arisen Necropolis or Jarad, Golgari Lich Lord
Blacks card draw seems to be becoming more erratic and harder to control, which in turn makes it more situational
To me, this has a lot to do with the relative strength and the nature of the payoffs
This red instant combines efficient, instant speed removal with a discard outlet, often letting you cast a madness card
Whatever it is, you can let me know in the comments down below or find me hovering around our official Discord server