Octanut

This is second plants created by Natapat that not get deleted, Octanut block the zombies.

Almanac Entry
Sun Cost: 425

Recharge: Very Slow

Toughness: Extremely High

Special: Immune to instant kill damage.

Gallery
Who have another version of this plant say it in comments.

Trivia

 * The plant name is a pun of Octagon and Nut.