Abyss Watchers

Haste, first strike.
The legendary creature rule doesn't apply to the
Abyss Watchers for the first turn that there are
more than one of them onto the battlefield.
After that first turn destroy the Abyss Watchers
that would have triggered the legendary creature
rule. The Abyss Watchers get +1/+1 for each
card named Abyss Watchers in all graveyards.