A Master of Etherium might be okay to trim as it can be outsized or Reflector Maged, keeping to the hidden four three-drops against fast decks rule. Blood Moon and Ghirapur Aether Grid are too slow to do anything
The current mulligan rule for most formats is the London Mulligan, where you always redraw a new hand of seven cards regardless of how many mulligans youre up to, but then return cards from that seven to the bottom of your library until you reach the size youre meant to be at
Collector boosters focus on foils and rare treatments, making them more fit for collectors, while set boosters lean toward casual fun with story-driven cards and regular lands for more regular play
But they wont last as long as a good Ultimate Guard, Dragon Shield, or other brands
In my example, Y'shtola, Night's Blessed is a great commander to maximize my use of Toxic Deluge, so in the Deck Filters area, I started typing the card name, it popped up so I selected the card and clicked the + button to the right and now the green box below it tells me the decks I view will include Toxic Deluge
