Killer Cat is an enemy appearing in Day of the Cats Event. Completing this event will unlock its Cat's counterpart, Killer Cat (Rare Cat).
This is basically a watered-down Crazed Cat with a Black attribute, but it gains a strength magnification as the player progress through the Event. Luckily, it only attacks one Cat at a time(single target), but spawns in huge groups in the last stage. To beat them, you can outlast them as their spawn rates eventually decrease to a mangeable level.
How to beat 222 Stage: 3 cheap Meatshield Cats,Tank Cat and Crazed Tank Cat recommended ,Jiangshi Cat Wargod Nobunaga,Awakened Bahamut Cat,some high damage dealer,use Masamune Cat and Fire Squad Item : Rich Cat (Required). Wait until the first Killer Cat comes out,then send out cheap meatshields until you can spawn Awakened Bahamut,spawn meatshields carefully,watch the money. Spawn few Jiangshi Cats as soon as first Killer Cat is killed. Wait until the enemy cat cannon fires,then spawn all meatshields, remember your money should be enough to spawn Nobunaga Cat.(Just spawn Nobunaga and meatshields after the enemy fires their cat cannon) The moment you know you will win is when Nobunaga Cat freezes the first Killer Cat group,keep spamming meatshields,wait until you have enough money to spawn other Uber's. Boom! You win!