r/mtgrules • u/Tall-Garbage4066 • 19d ago

Continous effect.

Suppose there is an effect that says, “Creatures you control with power 4 or greater have haste.”

If I control a creature with power 3 that is equipped with an Equipment giving it +2/+2, how is this handled under the current CR?

Continuous effects that modify power and toughness are applied in Layer 7, while effects that grant or remove abilities are applied in Layer 6.

Does the application of the Layer 7 effect cause the Layer 6 effect to become applicable? In other words, is the creature considered to have power 5 when determining whether the Layer 6 effect applies?

Can an effect in Layer 6 depend on a characteristic value that is determined in Layer 7?

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u/peteroupc 19d ago edited 18d ago

An effect of the kind you're describing is not practically functional under the comprehensive rules. If such an effect were to exist, the effect wouldn't take account of layer-7 effects to see what power a creature has. Indeed, see C.R. 613.1, 613.1f-g. Also, the rules for dependency and timestamps under C.R. 613.7 and 613.8 apply only to the case of effects in the same layer or sublayer.

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u/ardarian262 19d ago

While this is the answer, there are some parts within layers, such as devotion and [[Altar of the Pantheon]], which work counter to how the rules should work in theory. It's not impossible for WoTC to make a card that breaks the CR and in fact many do, but this specific way of doing it is unlikely to be done.

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u/peteroupc 19d ago

Effects that modify devotion are governed by C.R. 700.5a. See the rule's example.

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u/ardarian262 19d ago

It's mostly it going in-between layers that do not have sub-layers which I was referring to.

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u/Tall-Garbage4066 19d ago

Thank you! Could you please explain why [[Altar of the Pantheon]] works counter to how the rules should work?

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u/Judge_Todd 19d ago edited 19d ago

Devotion is used for Layer 4 effects of Theros gods and is based on the mana symbols of the objects, which can be affected by Layer 1, 2, and 3 effects and also the effect of Altar. Without 700.5, Altar would apply after the layers and wouldn't do whst it is intended to do.

Even with the rules as they are, it can have an unintuitive result. Attach Song of the Dryads to Altar and it still affects devotion.

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u/peteroupc 19d ago

Effects that modify devotion are governed by C.R. 700.5a. See the rule's example.

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u/ardarian262 19d ago

Normally with layers, nothing can go in-between layers. All of layer 3 applies then Layer 4 applies. But Altar slips between those 2 layers to apply its effect.