Tip:
Highlight text to annotate it
X
The final layer, applied in continuous effects interactions, is switching the power and toughness.
Any effects that switch the power and toughness are applied after all the other effects have
been applied. As such, the Brigid, hero of Kinsbale, which is normally a two, three,
being effected by a merfolk-thermatogist, which says "Switch target creatures power
and toughness until end of turn", will become a three, two. That means that it'll deal three
power, and it can only survive until it's taken two points of damage. This will be applied
after all other continuous effects have interacted. As such, it's the last thing that you check
when trying to figure out the game state involving multiple interactions and multiple continuous
effects. There's a large number of these effects, and if more than one of them happen to the
same thing, they simply cancel each other out. An even number will not change the power
and toughness, and an odd number will.