Y And/Or Z
Giving us one or two additional variables to work with would allow people more creativity. Just an idea!
This discussion has been closed.
It looks like you're new here. If you want to get involved, click one of these buttons!
Comments
If you meant in general, well, nothing stops you from just writing them in in the rules text
http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=214384
http://mtgcardsmith.com/view/urza-master-artificer-14
Scaling Mass