Kudo, King Among Bears bug: perpetual and universal effect.
I enchanted my opponent's Kudo, King Among Bears with Imprisoned on the Moon. Even though he no longer had an ability (per Imprisoned on the Moon), all of my creatures and my opponent's creatures remained as bears. Additionally, this effect applied to creatures that had not been cast yet.
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Rezzahan#77802
commented
That's because Kudo's effect includes a type change, and thus starts applying in layer 4. Imprisoned in the Moon also includes a type change, so also starts applying in layer 4. But there is no dependency for those two effects, so they are applied in time stamp order. And since Kudo's effect has started applying, it gets apply fully, even though the ability is removed later in layer 6.
In essence, making permanents like Kudo lose their abilities will not stop them from applying their effects. Same goes for Ashaya, Kaito, etc.