Ice Hen

Ice Hen is a sneaky 3-cost 2/3 pet zombie. Which says when this enters a lane: freeze all plants in that lane.

And when a plant gets played here: Move this to a random lane.

Just like fire rooster this is an event card.

Strategy:

Brain Freeze-You can have a powerful pet army, especially with Cryo-Yeti! Because Cryo-Yeti could get up to +4/+4 everytime this moves! And it could make you even more powerful with Cat Lady or Zookeeper!

I'd probably say that Brain Freeze is the best with this but, Huge-Gigantigus and Super Brains are pretty close:

Super Brains/Huge Gigantigus- If you have Teleport or Teleportation Zombie, this would be even better! Because you could freeze all plants in a lane without them expecting it! Also once again, this is still great with Cryo-Yeti.

Neptuna- This would also be great with Neptuna, because she can boost health better than everybody else.

And you could give this a healthy treat to really make this powerful! And you could give this and Cryo-Yeti frenzy to become unstoppable!

Impfinity- Impfinity is probably the worst with this out of all of these(No offense). But, he could boost the Ice Hen's strength a lot, and do instant damage. And all sneaky heroes have Cryo-Yeti so of course, use him.