A devoid card with blue mana symbols in its mana cost can still appear only in decks with a commander that includes blue in its color identity
Jack also has Articuno cards that can dish out a lot of damage, so use a couple Defenders
Discover can be thought of as a variant of Cascade, but where Cascade was linked to the cards mana value and triggered when the card was cast, Discover will be written with a number next to it and can be triggered in multiple ways
Well, if youre going to play Edgar Markov, Im going to have to run this Numot deck. If thats your life, you need Epicenter in that deck to bring the pain
The other card will be a rare or mythic rare, which could be a stained-glass legend, an extended-art card, or a borderless planeswalker