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(2025-06-06) If you are instructed to put a card that isn't a double-faced card onto the battlefield transformed, it will not enter at all

I also like this in decks with an evasive leader like the flying Rith, the Awakener that swings to get pumped and loves level 3 quite ably too for later fun times

Similar, all restrictions or costs to attack are ignored

Invasion of Karsus has an effect that definitely affects the board state, in copying some classic spells like Anger of the Gods and Sweltering Suns

All of this is to say that Oko is extremely hard to answer in combat, so it largely requires a spell to deal with it (or, as we see in Throne of Eldraine Standard, you can go way over the top of its threat generation by, for example, making lots of 2/2s with Field of the Dead)

It might stick around a bit to grab enchantments from opponents graveyards