In the case of our Death's Shadow list, the deck is playing 43 nonlands, so we can divide 33 (the total CMC) by 43 (the number of nonlands) to find the average converted mana cost of the nonland cards in the deck
$5.99 Lightning Bolt (083 - Foil) Secret Lair $1.29 Tidings (Textless) Promotional $4.49 Harmonize (Textless) Promotional $10.99 Commercial District Murders at Karlov Manor $13.99 Burst Lightning (Textless) Promotional $1.79 Bituminous Blast (Textless) Promotional $2.99 Mortify (Textless) Promotional $5.49 Lightning Bolt (1871 - Vivi's Thunder Magic - Foil) Secret Lair $5.99 Pyrokinesis Alliances $5.49 Lightning Bolt (085 - Foil) Secret Lair $8.49 Harrow (Textless) Promotional $1.99 Reciprocate (Textless) Promotional 0 results found
cards 10 Sleeves 70 Bonus Pack 1 (3 cards) Playsheet 1 My Verdict: This is the kind of deck you get when you want to go all-in on style and strength
There were multiple combo decks, for existence, that took advantage of this rule
This is, primarily, thanks to the Multiverse Legends bonus sheet, and the return of serialized MTG cards
Normally, combat damage is dealt all at the same time