: Monstrosity 10. This ability costs less to activate for each creature with power 4 or greater your opponents control. (If this creature isn’t monstrous, put ten +1/+1 counters on it and it becomes monstrous.)
When Grim Giganotosaurus becomes monstrous, destroy all artifacts and creatures other than Grim Giganotosaurus.
Monstrous isn't an ability that a creature has. It's just something true about that creature. If the creature stops being a creature or loses its abilities, it will continue to be monstrous.
10-11-2023
wotc
Once a creature becomes monstrous, it can't become monstrous again. If the creature is already monstrous when the monstrosity ability resolves, nothing happens.
10-11-2023
wotc
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.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
: Monstrosity 10. This ability costs 
less to activate for each creature with power 4 or greater your opponents control. (If this creature isn’t monstrous, put ten +1/+1 counters on it and it becomes monstrous.)
Daren Bader2023-11-17
