Metal One Horn has an extremely fast attack rate compared to hisvariants, but has very slow movement speed and pitiful range. He is a mid-tier Metal enemy; while his sizable bulk and rapid attack rate makes him a tough foe for players without Critical Hitters, his low range, speed and health allow most Critical Hitters to make quick work of him.
Metal One Horn has much higher HP compared to Metal Hippoe and Metal Doge, so Critical Hits are a must.
Spam cheaper and easier-to-produce cats to block him and spawn some long-ranged Critical Hitters to damage him.
Metal One Horn can demolish your units. If he gets too close for comfort, it is recommended to send out Puppetmaster Cat and Showoff Cat, which can stop his movement.
Critical Hitters, like Jurassic Cat, or even Moneko can destroy Metal One Horn(100%) in mere 15 seconds , at levels as low as 15.