This is mostly used to swap the tapped status of various permanents on the battlefield, including on your opponent's side of the board
First Look at Magic: The Gathering Foundations Whether you're taking your first steps into Magic , finishing up your Standard deck, or diving deep into Modern, Commander, and more Magic: The Gathering Foundations is where to start playing
Another oddity, MTG Final Fantasy has a single pair of Meld cards
So a successful mutate doesn't count as a creature entering the battlefield to trigger Guardian Project
If you wait until after the declare blockers step, because all combat damage is dealt at once, Yuffie won't normally deal combat damage
Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keywords (such as prowess) are triggered abilities and will use "when," "whenever," or "at" in their reminder text