Koilos Roc

four generic mana one blue mana Creature — BirdPower and toughness3/3

Flash

Flying

When this creature enters, create a tapped Powerstone token. (It's an artifact with " tap this permanent : Add one colorless mana . This mana can't be spent to cast a nonartifact spell.")

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Showing The Brothers' War#55

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0.04 $

Foil 0.07 $

8 printings

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Koilos Roc rulings

2022-10-14
Powerstone tokens are a kind of predefined token. Each one has the artifact subtype "Powerstone" and the ability ": Add . This mana can't be spent to cast a nonartifact spell."
2022-10-14
You can use the 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
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.

Koilos Roc keyword rules

Flying Rule 702.9

Flying is an evasion ability.

A creature with flying can’t be blocked except by creatures with flying and/or reach. A creature with flying can block a creature with or without flying. (See rule , “Declare Blockers Step,” and rule , “Reach.”)

Multiple instances of flying on the same creature are redundant.

Flash Rule 702.8

Flash is a static ability that functions in any zone from which you could play the card it’s on. “Flash” means “You may play this card any time you could cast an instant.”

Multiple instances of flash on the same object are redundant.