Tumorhead

Tumorhead is a Core enemy with an aggressive reactive behavior: when struck, it immediately dashes forward toward its attacker rather than retreating. Its melee attack knocks targets back 3 tiles on each hit. This combination makes it punishing to engage at close range — hitting it triggers a forward lunge, and any follow-up melee receives the knockback treatment.

The forward dash on taking damage means Tumorhead essentially charges toward any cat that attacks it, regardless of range. This makes it counterintuitive to fight — attacking from distance causes it to close the gap immediately. The 3-tile knockback then forces hit cats backward, potentially into walls or other enemies.

Ranged attacks from a position that Tumorhead cannot easily close on are the safest approach — use terrain, walls, or elevated positions that interrupt its dash charge. Immobilize prevents both the reactive dash and the melee knockback, essentially neutering its entire toolkit. If melee engagement is necessary, ensure knockback paths are clear and cats don't get pushed into other enemies.