But if you take care, this should be avoidable
The trigger event doesn't have to specifically refer to legendary permanents or to artifacts, nor does it have to specifically refer to when something "leaves the battlefield." For example, an ability that triggers "whenever a creature dies" would trigger twice if a legendary creature or an artifact creature dies while Gandalf the White is on the battlefield, as would an ability that triggers "whenever a permanent is put into a graveyard from the battlefield." Look at each legendary permanent and each artifact as it exists on the battlefield, taking into account continuous effects, to determine whether any triggered abilities will trigger multiple times
More immediate and reliable cards in hand also works much better with Molten-Tail Masticore
The very first print run, however, did not include rarity symbols on the cards
In Sword & Shield , the Trainer Hop allows you to draw three cards, but as a Supporter card can only be played once per turn