Cards like Mycosynth Lattice or Trinisphere push Karn from irritating to game-ending, and the fact that this happens without attacking explains why he ranks among good planeswalkers, arguably one of the best to ever get printed for artifact-heavy metas
Just a few days after it was first leaked, this upcoming precon is already starting to cause price spikes

Sort Card Type Brock's Primeape #35Uncommon $3.53 Dark Primeape #43Uncommon $2.15 Primeape #29Rare $57.39 Primeape #43Uncommon $1.56 Primeape #18Promo $34.16 Primeape #59Uncommon $1.74 Primeape #28Rare $1.93 Primeape #27Rare $1.06 Primeape #39Rare $1.55 Primeape #22Rare $2.02 Primeape #60Common $0.39 Primeape #53Rare $0.31 Primeape #51Rare $1.02 Primeape #72Rare $0.36 Primeape #67Rare $0.19 Primeape #134Uncommon $0.06 Primeape #108Common $0.09 Primeape #107Uncommon $0.08 Primeape #57Uncommon $0.09 Primeape #99Common $0.18 Primeape #91Common $0.12 Primeape #46Common $0.08 Primeape #61Common $0.11 Primeape #57Uncommon $0.09 Primeape #39Common $0.11 Primeape #50Common $0.08 Primeape #29Uncommon $0.45 Primeape #53Uncommon $0.94 Primeape #24Uncommon $1.77 Primeape #25Uncommon $1.99 Primeape #41Common $0.28 Primeape #43Common $0.05 Primeape - 046/091 #46Uncommon $0.04 Primeape - 101/190 #101None $0.09 Primeape - 107/193 (Cosmos Holo) #107Uncommon $0.35 Primeape - 170/091 #170Shiny Rare $4.14 Primeape - 277/190 #277Shiny Rare $1.24 Primeape (Delta Species) #50Uncommon $3.66 Primeape (Master Ball Pattern) #57Uncommon $10.48 Primeape (Poke Ball Pattern) #57Uncommon $0.58 Primeape #29Rare $57.39 Primeape #18Promo $34.16 Primeape (Master Ball Pattern) #57Uncommon $10.48 Primeape - 170/091 #170Shiny Rare $4.14 Primeape (Delta Species) #50Uncommon $3.66 Brock's Primeape #35Uncommon $3.53 Dark Primeape #43Uncommon $2.15 Primeape #22Rare $2.02 Primeape #25Uncommon $1.99 Primeape #28Rare $1.93

The only other similarly effective Proliferate engine in the set is Evolution Sage , which is represented by the green color
Imagine how good his phasing ability would be with "damage on the stack" these days
Similar to how a big dog will curl up on a small couch, lap, or bed, Garchomp is clearly sleeping in a very comfortable place, most likely their trainer's home or maybe even on the road if they are both chasing that dream of being a champion