Oozeavite is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Oozeavite enters with each of a vigilance, reach, trample, and hexproof counter on it. These are also +1/+1 counters. If Oozeavite would be dealt damage, instead create a 0/0 green Ooze creature token and move a counter from Oozeavite onto it. Then if Oozeavite has no counters on it, sacrifice it. , : Move any number of counters from other creatures you control onto Oozeavite.