Tetravus

Flying
Tetravus comes into play with three +1/+1 counters on it.
At the beginning of your upkeep, you may remove any number of Tetravites created with Tetravus from the game. For each Tetravite removed this way, put a +1/+1 counter on Tetravus. Then you may remove any number of +1/+1 counters from Tetravus. For each +1/+1 counter removed this way, put into play a 1/1 Tetravite artifact creature token with flying and with "Tetravite can't be enchanted."