Most of the sets strategies didnt land in the meta, but one deck has thrived as the formats best single-prize option: Ethans Typhlosion
I already talked about the rules, but another aspect that needed a lot of wrangling was the color pie
Meanwhile, Mox Opal rewards artifact density by turning on quickly in decks full of 0-cost artifacts, and Mox Amber fits perfectly in commander-reliant lists, generating colored mana as soon as your legend hits the board
Beyond aesthetics, its EX stats also provide competitive playability
Any Ezuri, Claw of Progress deck will welcome Katara with open arms
Once a creature has been blocked, that creature remains blocked and will deal and be dealt combat damage even if it gains or loses shadow or if the blocking creature gains or loses shadow