Tsunami, the wave of doom

Flash (this card can be played at any time an instant
could)
Tsunami deals 7 damage to any creature or gives a player 10 drown counters (any player with 5 or more
drown counters takes X damage at the beginning of
their upkeep where X is how many drown counters
they have)
"the wave towered over the city as they knew it was
over"