If a Vehicle loses all abilities between activating the Crew ability and it becoming a creature (for instance, if it somehow becomes enchanted with Song of the Dryads), it will become animated and will have the printed P/T values
These are closest in nature to action cards, and are basically a subsection of them
As we would expect any Yarok deck to play a significant number of creatures and artifacts that have ETB abilities, it's a no brainer to add another artifact that will add an additional trigger, giving you potentially three of every trigger
Marvel ensures you have no maximum hand size, and whenever you cast a spell that targets a creature you control, you draw a card
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These decks work really well with Black Mage's Rod because there are so many noncreature spells you can cast in these decks