The banning of Attune with Aether and Rogue Refiner has definitely done a number on Standard. We lost our best fixer and our best card advantage spell that both provided additional energy. With these losses, the correct path is to just move away from green entirely.
By playing Grixis, you get to play some high quality threats and the best removal the format has to offer. You’re not as aggressive without 2-drops like Longtusk Cub to beat down and Servant of the Conduit to accelerate, but you get to play Glint-Sleeve Siphoner instead. This thing is tough to block thanks to menace and can provide a steady stream of card advantage. While any removal spell should take care of the Siphoner, it demands one immediately or your opponent will be very far behind. It’s good early, good late, and demands a removal spell. You can’t ask more of a 2-drop
The problem with Longtusk Cub wass that it’s one of the few threats that trades “even” with removal spells. If you look at the other threats in Temur Energy, everything else can provide some immediate value. That’s where Grixis gets its biggest edge. Whirler Virtuoso adds another excellent enters-the-battlefield ability by providing you with energy, and creating multiple bodies with 3 total power for 3 mana is an excellent rate. Players may be gearing up to play more 1-toughness creatures in Standard with the expectation that there will be fewer Whirlers—but not so fast.
Ravenous Chupacabra is the fun police. If you want to play a big, bad creature that doesn’t provide immediate value, the Chupacabra will laugh in your face. It’s sorcery-speed removal, but it’s unconditional and leaves behind a 2/2 creature just in case.
The Scarab God doesn’t necessarily provide immediate value unless you have 9 mana available, but it also can’t be handled by many removal spells in the format. Once online, the God just takes over, especially in a deck where all of the creatures you’re playing have excellent ETB abilities. The Scarab God is going to make good friends with Ravenous Chupacabra in new Standard.
Glorybringer ends the game in a hurry and demands immediate instant-speed removal. Getting hit by an exerted Dragon once means you’re already down a card, and now you have to expend resources to kill the Dragon before it comes back for more. If they aren’t exerting it, you’re likely already dead or so far behind that you might as well be.
Torrential Gearhulk provides some real value. Grixis has lots of powerful removal, interaction, and card draw, so the Gearhulk will combo well with your 16 main-deck instants.
You want removal? You’ve got removal. The full play set of Harnessed Lightnings kicks things off as a way to scale up to kill creatures or provide extra value when killing smaller ones. You can use that extra energy later on Aether Hub fixing, Siphoner card draws, or making Virtuoso tokens. Some Fatal Pushes and Abrades give you plenty of ways to kill early drops and trade up on mana. Vraska’s Contempt gains you a bit of life and a solid answer to otherwise tough-to-deal-with cards like Hazoret, The Scarab God, and various planeswalkers.
Glimmer of Genius adds some cards and value thanks to your energy sinks. Supreme Will gives you some options in your instants as you can counter a spell or dig for a better answer. Getting Supreme Will in the graveyard also provides extra Torrential Gearhulk fodder. Essence Scatter is yet another way to deal with indestructible, hexproof, and haste creatures.
Chandra, Torch of Defiance rounds out your Grixis deck. You can protect her with your card advantage creatures and Virtuoso army, and she can wipe out an opposing creature, provide card advantage, or ramp you up in a deck with plenty of great late-game mana sinks.
Without Attune and Refiner, energy decks will need to adjust if they want to survive, and cutting green to play strong threats and answers sounds like a reasonable approach going forward.