Kalemne's Captain

Text:

Vigilance
: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
When Kalemne's Captain becomes monstrous, exile all artifacts and enchantments.

Rulings:

• 11/4/2015 Once a creature becomes monstrous, it can’t become monstrous again. If Kalemne’s Captain is already monstrous, the activated ability won’t do anything.
• 11/4/2015 Monstrous isn’t an ability that the creature has. It’s just something true about that creature. If the creature stops being a creature or loses its abilities, it continues to be monstrous.
• 11/4/2015 An ability that triggers when a creature becomes monstrous won’t trigger if that creature isn’t on the battlefield when its monstrosity ability resolves.