Zergling

As long as you control a Kerrigan planeswalker Zergling has +1/+0.
As long as you control an Abathur planeswalker Zergling has vigilance.
As long as you control a Zagara planeswalker
Zergling has {t}: Zerglings deals 1 damage to
target player.
A deck can have any number cards named Zergling.
"Um...ever try to wrestle a Zergling? Not fun.
—A Dominion Marine