Oyster-shroom

Oyster-shrooms are mushroom-summoning, semi-aquatic mushrooms that create an entire column of themselves.

Overview
Oyster-shroom is very simple. When planted, every open tile on the same column as it was planted will be filled with another Oyster-shroom. If this is in water, Oyster-shroom's health will be tripled (9 ndb).

Oyster-shrooms will not stop All-Star Zombie or the Zombie Bull from their charging attack. Instead they will only either reduce the damage they'll deal, or they'll reduce the speed of the charge.

Oyster-shrooms fall asleep in the day-time, causing it to not summon more of itself. However, it will be awake if it is planted in water.

Plant Food Ability
Using Plant Food on Oyster-shroom causes it to make a row of armored Oyster-shrooms either in front of or behind it, depending on how many open spaces there are. Armored Oyster-shrooms have 12 ndb of health.

Strategies
Oyster-shroom is cheap and effective at what its purpose is, which is to stall zombies for a short amount of time. They can be useful early on in the level, where the player can keep the first zombies away for a bit. They are also useful against stalling Gargantuars.

They can be planted in the water to cause Snorkel Zombie to become targeted. They'll also cause Dolphin Zombies to jump.