Kernel Corn is a premiumlegendaryplantcard in Plants vs. Zombies Heroes, and a member of the Kabloom class. It costs 8 to play, and has 5/5. It does not have any traits, and its ability does 4 damage to every zombie on the field when it is played.
What he lacks in a sense of humor, he makes up with attitude... and dual Cob Busters.
Strategies
With
Doing 4 damage to every single zombie on the field, Kernel Corn is a complete superior to Sour Grapes, and Template:PvZHLink as well if there is an empty lane to play it.
When your opponent attempts to swarm you with zombies, play Kernel Corn to wipe out or severely damage your opponent's zombies for it and your other plants to finish off the weakened ones and hit your opponent.
If you are playing as Nightcap, you can play Rescue Radish to Bounce Kernel Corn and let you replay it later on. If you are playing as Solar Flare, you can play this earlier by making excess sun.
However, Kernel Corn is not quite good at handling single threats, so it becomes less effective if your opponent focuses on investing on a single zombie. It also has a hard time when your opponent fills the field with tougher zombies, such as Valkyrie or any Gargantuar, excluding Wannabe Hero when your opponent is low on health, so you should be careful on when you should play it.
Kernel Corn is a very dangerous plant, as it can demolish both your defenses and you as well. Try playing instant-kill tricks such as Locust Swarm, Cut Down to Size, or Rocket Science, or Deadly zombies to get rid of this plant.
If its ability is what you fear the most, having either high-health or Armored zombies on the field lessens the harm. If you want your zombies to be unaffected by its ability, you can play Gravestone zombies or Mixed-Up Gravedigger, or sneak some in with Teleport.
It is strongly recommended not to Bounce this plant because your opponent can replay it again, possibly wreaking havoc once again on your already-weakened defenses, unless you need to stall for one more turn.
Gallery
Plants vs. Zombies Wiki has a gallery for Kernel Corn (PvZH).