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 put onto the battlefield with Tetravus. If you do, put that many +1/+1 counters on Tetravus.
Flying
When Tetravus comes into play, put three +1/+1 counters on it.
During your upkeep, you may move each of these counters on or off of Tetravus, regardless of who controls them. Counters that are removed become Tetravite tokens. Treat these tokens as 1/1 artifact creatures with flying. These creatures cannot have enchantment played on them and do not share any enchantments on Tetravus.
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