The flexibility of being able to choose a value for X is great because we might have an early-game case of wanting (or needing) to cast it for X of one or two, or we can wait until late-game and sweep a much bigger battlefield
Its no easy feat milling out 100 cards, let alone when youre trying to do it to multiple opponents
Command your crew
P/T Number 284 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (4/16/2021) To double the number of +1/+1 counters on a permanent, put a number of +1/+1 counters on it equal to the number it already has
Menace and ward are going to help you attack profitably and avoid removal, at least somewhat