Endurian

Endurian is the third plant obtained in Lost City in Plants vs. Zombies 2. Endurian is a defensive plant that can also damage zombies while taking damage.

It was first revealed in the Lost City Part 1 trailer, and then gameplay of it was shown in the Lost City Part 1 Dev Diary.

Plant Food
When fed with Plant Food, it gains armor with spike on both sides. The armour deals extra damage, but attacks slower

Trivia

 * Endurian is a portmanteau of "endure" and "durian."
 * This, Chard Guard, Infi-nut, and White Radish are the only plants that have Elevated toughness.
 * Endurian is extremely similar to Durian, a plant in Plants vs. Zombies Online which is also defensive and damages zombies.
 * Coincidentally, they are both durian plants, so it is possible that the latter plant influenced the creation of Endurian.