It was playing into hybrid's ability to make two-color pairs function like monocolor in terms of cost
//// Prowl, Pursuit Vehicle Color indicator: white Legendary Artifact Vehicle 2/3 Living metal (As long as it's your turn, this Vehicle is also a creature.) Whenever another creature or Vehicle enters the battlefield under your control, put a +1/+1 counter on Prowl
A massive 6/6 wurm with deathtouch and lifelink is hard to race in the air or on the ground, and even if you kill it with a removal spell or a double block, it returns as two bodies which can be way worse
The remaining five decks are all monocolor "Foundations decks"
Ultimately I would probably avoid adding more tapped lands to my deck to facilitate this addition
Phyrexian Metamorph Phyrexian Metamorph was once the undisputed best clone in Commander, but 10+ years of set releases have provided competition