Oracle

Enchantment 

At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it.

Tournooi-info

Legal in: Vintage, Legacy, Modern, Commander

Officiele rulings

8/1/2008
This ability is mandatory. If you’re the only player who controls a creature with a -1/-1 counter on it as your upkeep begins, you must target one of your own creatures.

8/1/2008
You can’t target a creature unless it already has a -1/-1 counter on it as your upkeep begins. Putting a -1/-1 counter on a creature during your upkeep won’t let Crumbling Ashes destroy it that turn.

8/1/2008
If the targeted creature loses all its -1/-1 counters by the time the ability resolves, the ability won’t resolve because its only target is illegal. The creature won’t be destroyed.

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