In particular, many Magic: The Gathering dragons have abilities that pay off when other dragons enter the battlefield or attack
The rules text said, "a creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it." That really just moved the problem around to the other colors
the mono-red ones in Planar Chaos , for example, just used R.) A Artifact (This is for traditional colorless artifacts
It can help get lands for your late game threats while potentially getting more creatures into your graveyard with its double explore ability
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