Wave of Terror is a rare Enchantment card from Weatherlight (WTH), collector number 86. Current market price: $0.88, TCGplayer market prices via Scryfall.
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.