Although converting a permanent uses the same physical action as turning a permanent face up or face down, they are different game actions. Abilities that trigger when a permanent is turned face down won’t trigger when that permanent converts, and so on.
July 3, 2020 · Core Set 2021
Although transforming a permanent uses the same physical action as turning a permanent face up or face down, they are different game actions. Abilities that trigger when a permanent is turned face down won’t trigger when that permanent transforms, and so on.
April 27, 2018 · Dominaria
rule 701.28b not present in this release
September 30, 2016 · Kaladesh
If you control no creature tokens when instructed to populate, you won’t create a token.
July 17, 2015 · Magic Origins
Monstrous is a designation that has no rules meaning other than to act as a marker that the monstrosity action and other spells and abilities can identify. Only permanents can be or become monstrous. Once a permanent becomes monstrous, it stays monstrous until it leaves the battlefield. Monstrous is neither an ability nor part of the permanent’s copiable values.
May 1, 2014 · Journey into Nyx
If a permanent’s ability instructs a player to “monstrosity X,” other abilities of that permanent may also refer to X. The value of X in those abilities is equal to the value of X as that permanent became monstrous.
February 1, 2014 · Born of the Gods
If a permanent’s ability instructs a player to "monstrosity X," other abilities of that permanent may also refer to X. The value of X in those abilities is equal to the value of X as that permanent became monstrous.
September 27, 2013 · Theros
If a permanent's ability instructs a player to "monstrosity X," other abilities of that permanent may also refer to X. The value of X in those abilities is equal to the value of X as that permanent became monstrous.