This enemy base can attack Cat Units in range with a slow attack rate. Because it is a base, it does not move, similar to the Sun Doge and Drummer Doge. Its attacks are instant-kill, although Glass Cat and Metal Cat can survive due to having the Metal Ability, and cats with Survive can too. Like other bases, it is immune to most negative effects.
In reality, the Scarecrow’s health is not infinite as the chart above shows. It actually has 100 hp, but takes no damage, giving the impression that it has infinite health.