
Koilos Roc
{4}{U}Creature — Bird3/3
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Flash
Flying
When this creature enters, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
Keyword reminders
Flying. This creature can't be blocked except by creatures with flying or reach. · CR 702.9
Flash. You may cast this any time you could cast an instant. · CR 702.8
Official rulings
- Although all the cards in The Brothers' War that create Powerstone tokens create a tapped Powerstone token, entering the battlefield tapped isn't part of the token's definition. Notably, if you create a token that is a copy of a Powerstone token, the token copy won't enter the battlefield tapped. (2022-10-14)
- Powerstone tokens are a kind of predefined token. Each one has the artifact subtype "Powerstone" and the ability "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell." (2022-10-14)
- You can use the {C} added by a Powerstone token on anything that isn't a nonartifact spell. This includes paying costs to activate abilities of both artifact and nonartifact permanents, paying ward costs, and so on. (2022-10-14)
Cards like this
Functionally similar cards by meaning — playable in Koilos Roc’s colours.







