Abyss Watcher

Double Strike, haste
When Abyss Watcher enters the battlefield, put two 4/3 Abyss Watcher Tokens onto the battlefield.
Whenever Abyss Watcher dies, select one Abyss Watcher Token on the battlefield. It gains this card's text and keywords. Also, add +2/+2 to that card.
{b}{b}, Put one 4/3 Abyss Watcher Token onto the battlefield.