Ygra, Easter of All / tISHANA'S tDEBINDER
If I Tishana's Tidebinder a Ygra, Easter of All, it should turn off the ability that turns all creatures into food, but currently it does not.
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Rezzahan#77802 commented
And it will not. This is not a bug, but rather is how the game's layer system works. Ygra does lose its abilities. But that ability's effect has already been applied at that point. Granting card types happens in layer4, losing abilities in layer 6. Gaining abilities also happens in layer 6, but rule 613.6 covers, that the Food sacrifce ability is still granted despite Ygra not having that ability anymore.
613.6. If an effect should be applied in different layers and/or sublayers, the parts of the effect each
apply in their appropriate ones. If an effect starts to apply in one layer and/or sublayer, it will
continue to be applied to the same set of objects in each other applicable layer and/or sublayer, even
if the ability generating the effect is removed during this process.