Flash (You may cast this spell any time you could cast an instant.)Flying (This creature can't be blocked except by creatures with flying or reach.)
When Koilos Roc enters the battlefield, create a tapped Powerstone token (A Powerstone is an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.").
Vintage
: Add 
. This mana can't be spent to cast a nonartifact spell.")