What is the seventh layer when dealing with continuous effects?

The seventh layer in the sequence of applying continuous effects specifically pertains to power and toughness changes. This means that any effects that modify the power or toughness of a creature are applied in this layer, and they take priority over changes made in previous layers.

In the context of the Comprehensive Rules, the layers are structured to ensure a clear order in which effects are resolved, as some effects can interact in complex ways. The layers are numbered from 1 to 7, each dealing with different types of modifications. Power and toughness changes are considered a critical aspect of how a creature functions, as they directly affect its combat capability and overall effectiveness in the game.

Understanding the structure of these layers is vital for judges, players, and anyone involved in competitive play, as it allows for accurate communication about how game effects interact and the correct resolution of any conflicts that arise from simultaneous effects or interactions that could alter a creature's combat stats.