Alien Decimator is a mower found in the alien shop. It costs the most out of the three. The Decimator just got a buff after Guest realized that the Excalibur was stronger than it but costs a lot less.
It costs 999 billion to buy in the secret shop. It is the most expensive of all of the secret items in that shop.
Buffed so the power matches the price.
The three secret alien items were all designed (but not coded) by Dannyha, a fan of Mow My Lawn.