In Standard, it can be cast on Turn 2 after casting either Gilded Goose or Arboreal Grazer, and it plays particularly well with either one, in that Oko and Gilded Goose each make Food for the other one, so you can keep making mana or keep making Elks as needed, and with Arboreal Grazer, you can immediately turn the Grazer into an Elk and attack for three on Turn 2
On the first Monday of every month I've been ruminating about the subject of winning games of Commander
Temur Sabertooth looks like a top pick in this format since it looks like a total nightmare for an opponent to deal with in combat and
Some interesting cards are: Lonely Sandbar, which has the cycling ability
In terms of gameplay, Karns one colorless mana activated ability can be quite useful if youre looking to turn your mana rocks into attackers out of nowhere, but this cards value is tied more to its rarity and Karns lore significance
The new card styles will be available starting with cards from the next two upcoming sets, War of the Spark and Core Set 2020, but Wizards will be adding styles to cards from earlier sets as time goes on