Reprobation Has No Effect On Toph, the First Metalbender
I casted Reprobation on my opponents Toph. On his turn, his artifacts are still triggering Landfall triggers on a Mossborn Hydra. Reprobation should have removed these artifacts ability from becoming lands on entering the battlefield. I lost this game despite removing Toph’s ability to make nontoken artifacts lands being removed, as they triggered anyway despite my Reprobation. Regular Brawl mode.
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Rezzahan#77802
commented
Not a bug. This is just yet another example of layers of continuous effects in action. Like Ashaya, Kaito, Kudo, Ygra, and many others, Toph changes card types, and thus applies in layer 4. Abilities are gained and lost in layer 6, so always after the type changes, regardless of time stamps.
In general, if an effect changes card types (including supertypes or subtypes), making the source lose its abilities does not and cannot shut down those effects. Same for color changes in layer 5, and all other effects applied before layer 6.
And even if such an ability has additional effects in layer 6 or 7, due to rule 613.6, since the effect starts applying in an earlier layer, it continues to apply completely, even if the ability generating the effect is lost in layer 6.