Cheapest priced copy (Weatherlight): $0.59 at Card Kingdom, near mint, their price list as of .
Wave of Terror 
Enchantment · Rare · Weatherlight · #86
Cumulative upkeep {1} (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.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.59 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Weatherlight | 86 | Rare | $0.59 | — |
3 rulings from Wizards of the Coast
- 1 June 2005Will 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.
- 1 April 2008If 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.
- 1 April 2008This destroys creatures with mana value exactly equal to the appropriate number, not equal to or less than that number.