Vigilance
![](images/referenceimages/icons/magic_1.png)
,
![](images/referenceimages/icons/magic_tap.png)
: Draw a card, then discard a card.
Whenever you discard one or more artifact cards, create a tapped Powerstone token. This ability triggers only once each turn. (The token is an artifact with "
![](images/referenceimages/icons/magic_tap.png)
: Add
![](images/referenceimages/icons/magic_colorless.png)
. This mana can't be spent to cast a nonartifact spell.")