Abyss Watcher

You may control two Abyss Watchers.
Only three Abyss Watchers may be present on the battlefield at any given time.
If a third copy of Abyss Watcher were to enter the battlefield under your control, instead, it enters the battlefield under target opponent's control.
{4}{b}{r}: Create a token that is a copy of
Abyss Watcher.