At the beginning of your upkeep, put a time counter on Time Bomb.
{1}, {T}, Sacrifice Time Bomb: Time Bomb deals damage equal to the number of time counters on it to each creature and each player.
Near Mint - $1.00
Near Mint Non English - $1.00
Lightly Played - $0.95
Lightly Played Non English - $0.95
Moderately Played - $0.85
Moderately Played Non English - $0.85
Heavily Played - $0.75
Heavily Played Non English - $0.75
Damaged - $0.60
Damaged Non English - $0.60