Here are some other breakdowns that might help visualize whats going on: Ramp & Land Tutor: Animists Awakening, Arcane Signet, Circuitous Route, District Guide, Dungeon Map, Enter the Unknown, Expedition Map, Explore, Explore the Underdark, Gatecreeper Vine, Hour of Promise, Midnight Clock, Nine-Fingers Keene, Open the Gates, Realm Seekers, Reap and Sow, Reshape the Earth, Scare-Tiller, Sol Ring, Summer Bloom, Sylvan Scrying, Tempt with Discovery, Ulvenwald Hydra Removal: Bar the Gate, Fateful Absence, Foul Play, Gates Ablaze, Gone Missing, Path to Exile, Putrefy, Root Out Other Card Draw & Further Investigation: Chief Jim Hopper, Confront the Unknown, Eleven, the Mage, Eloise, Nephalia Sleuth, Eye of Vecna, Guild Summit, Lonis, Cryptozoologist, Max, the Daredevil, Ongoing Investigation, Survive the Night, Thorough Investigation, Ulvenwald Mysteries, Will the Wise Running Up That Hill (Playing the Deck) Strangers Things One and Two (Early Game) This deck is super casual

They had experiences from the tournament world, which often biased them
Copycrook does not become a token
The Simplest Case (1 Copy of the Card) [1]
Not only is this good removal, but it also taps down both creatures
If that 5 power Shimmer Dragon has Fireshrieker attached to give it double-strike and a Blackblade Reforged attached to give it +1/+1 for each land you control, there's a good chance someone's going to be dealt lethal commander damage