Cactus

Undead Vanquisher. The Cactus has advantage on attack rolls against zombies.

Prickly Body. If the Cactus is grappled by a creature, that creature takes (6d4) piercing damage at the start of each of its turns while grappling the Cactus. If a creature hits the Cactus with an unarmed strike, it takes (3d4) piercing damage. 

Sniper. The Cactus has advantage on long rage attack rolls. Additionally, if the Cactus rolls an 18 or higher, it does a critical hit. 

Potato Mine. The Cactus plants a huge potato into the ground that partially emerges at the end of the Cactus' next turn. The potato has a 2-foot-diameter. If a creature steps on the potato after it emerges, the potato explodes, dealing (3d8) force damage. If the creature is Medium or smaller, it is blown 10 feet into the air. The potato can only be planted in soil, sand or mud that is 5 feet or deeper. Only 4 mines can be planted at a time. 

Spike Shot. Ranged Weapon Attack: +3 to hit, range 60/120 ft., 1 target. Hit: (1d12 + 3) [piercing] damage.

Garlic Drone. The Cactus sends out a large flying garlic to attack enemies from above. The garlic has a flying speed of 50 feet and 5 hit points. The garlic acts on the Cactus' turns, and while it is active, the Cactus' speed drops to 0. If at any point the Cactus is harmed, the garlic drops to 0 hit points and is destroyed. As an action, the garlic can make four Spike Shot attacks at a target within range. The Cactus can choose to dismiss the garlic as a bonus action. If the Cactus isn't harmed and does not dismiss the garlic, the garlic can be active until the end of the Cactus' third turn, after which it drops to 0 hit points. Once the Cactus used the garlic, it cannot send out another one until it finishes a short or long rest.