Flying Tetravus enters the battlefield with three +1/+1 counters on it. At the beginning of your upkeep, you may remove any number of +1/+1 counters from Tetravus. If you do, create that many 1/1 colorless Tetravite artifact creature tokens. They each have flying and "This creature can't be enchanted." At the beginning of your upkeep, you may exile any number of tokens created with Tetravus. If you do, put that many +1/+1 counters on Tetravus.
Near Mint - $23.700
Lightly Played - $19.000
Moderately Played - $16.600
Heavily Played - $14.200
Damaged - $11.900
Near Mint Spanish - $23.700
Lightly Played Spanish - $19.000
Moderately Played Spanish - $16.600
Heavily Played Spanish - $14.200
Damaged Spanish - $11.900