Sentient Plants
With his <Supreme Environmentalist>, <Supreme Botanist>, <Supreme Biologist>, <Supreme Gardener>, and <Supreme Farmer>, Allen thought of ways how to take advantage of the plot of land that surrounded his house.
After all, it wasn't ideal for him to plant landmines on his lawn since not only would it destroy the surroundings of his house when they would detonate, but it was also a one-time use item that was better off placed outside his fortified walls.
Allen preferred to add defense and attack items and weapons on his lawn that would last long rather than one-time used items such as a landmine or nuclear bombs.
Allen had previously created several layers of defenses such as his fortified wall, sunlight/moonlight forcefield, magic barrier, and defense array.
As for the attack system of his and Iris' house, he had only created two types of turrets.