Those will go live with the 20.0 patch later this month, and it will happen before the new content unlock/rotation, so for a short time, we will have a very interesting Standard meta.
When they were considering which cards to revert, they also took into consideration future rotations. Some cards that could potentially come back will receive only "soft" reverts, for example Mana Wyrm or Flametongue Totem. Another factor was how much of a positive effect will nerf reverts have on Wild, adding power to already strong archetypes wasn't something they wanted to do, so cards like Level Up! didn't make the cut. They want the reverts to enable you to play some of those decks of old.
- Starving Buzzard will return to a 2-mana 2/1.
- Flare will cost 1.
- Dinotamer Brann will cost 7.
- Hunter's Mark will cost 1.
- Mana Wyrm gets half-reverted to 1-mana 1/2.
- Conjurer's Calling will cost 3.
- Dragoncaster will cost 6.
- Wyrm Weaver will cost 4 and becomes a 3/5 and will summon two 1/2 Mana Wyrms.
When the 20.0 patch goes live later this month, there'll be a number of nerf reverts. This is before content unlock/rotation, so for a short period of time there will be a very interesting Standard meta. When considering reverts for 2021, we also considered future rotations. 1/4 (Source)
Could a card come back into Standard? We chose to softly revert those, as we'd like to avoid cards shifting between two costs or statlines each year. This will be the case for cards like Mana Wyrm or Flametongue Totem. They'll be back one day! 2/4 (Source)
Another factor was looking at the level of positivity a revert brings to the Wild environment. Adding power to already strong archetypes wasn't high on our list so you won't see cards like Level Up being reverted this year. Want these reverts to enable you to play old decks. 3/4 (Source)
Here's a batch for today. DH gets none, so we'll do Druid, Hunter, and Mage. Full revert unless noted.
Keeper of the Grove
Ancient of War
Hunter's Mark (costs 1)
Mana Wyrm (1 mana, 1/2)
Lore not War! Oops (Source)
As part of this Wyrm Weaver moves down to a 4 mana, 3/5 and summons two 1/2 Mana Wyrms. (Source)