Wave of Terror

two generic mana one black mana Enchantment

Cumulative upkeep one generic mana (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

At the beginning of your draw step, destroy each creature with mana value equal to the number of age counters on this enchantment. They can't be regenerated.

The sea of fear has endless depths.

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0.88 $

9 printings

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Wave of Terror rulings

2008-04-01
This destroys creatures with mana value exactly equal to the appropriate number, not equal to or less than that number.
2008-04-01
If you don't pay the cumulative upkeep, you'll sacrifice Wave of Terror before your draw step begins. It won't destroy any creatures that turn.
2005-06-01
Will not generally kill zero cost creatures because the age counters go on before the ability triggers. If would be possible if something like Power Conduit were removing counters.

Wave of Terror keyword rules

Cumulative upkeep Rule 702.24

Cumulative upkeep is a triggered ability that imposes an increasing cost on a permanent. “Cumulative upkeep [cost]” means “At the beginning of your upkeep, if this permanent is on the battlefield, put an age counter on this permanent. Then you may pay [cost] for each age counter on it. If you don’t, sacrifice it.” If [cost] has choices associated with it, each choice is made separately for each age counter, then either the entire set of costs is paid, or none of them is paid. Partial payments aren’t allowed.

If a permanent has multiple instances of cumulative upkeep, each triggers separately. However, the age counters are not connected to any particular ability; each cumulative upkeep ability will count the total number of age counters on the permanent at the time that ability resolves.