Abyss Watchers

Double Stirke, menace.
Abyss Watchers can attack/block an amount of creatures, equal to the number of Abyss Watcher creatures melded, or sarificed to Abyss Watchers.
{b}: Sacrifice an Abyss Watcher you control, give
Abyss Watchers +2/+2.
Abyss Watchers Power an Toughness is equal to
the amount of Abyss Watcher creatures melded
into it, plus 1.