Thankfully there is a banned and restricted announcement this upcoming Monday, and not only is some kind of energy ban expected to happen, there could even be a substantial ban across the mechanic hitting multiple cards
The only thing keeping Sygg at bay from the #1 spot is the "end of turn" delay on it
Additionally, in Standard, the most popular multi-color control deck makes better use of tri-color Lands with basic Land types, such as Sparas Headquarters
Mono blue frequently empowers combo decks, such as Urza, Lord High Artificer whose commander deck power level can creep into CEDH
Sephiroth, One-Winged Angel Legendary Creature Angel Nightmare Avatar Flying Super Nova As this creature transforms into Sephiroth, One-Winged Angel, you get an emblem with "Whenever a creature dies, target opponent loses 1 life and you gain 1 life." Whenever Sephiroth attacks, you may sacrifice any number of other creatures
Also, Ive removed the following cards that dont serve us well: You can find the final full deck list here