Excelery

Excelery is a plant that when planted, It will calculate for 30 seconds, then shoot a random number to zombies. The more numbers it shoots, the more damage it'll take. For example, if it shoot the number 12378, the number will damage 5 NDS. The limit is 8 numbers.

Trivia

 * It's a portmanteau of Excel (the system that help you makes tables and calculates) and Celery.
 * Excelery looks like a laptop, when activiting Excel