English (Source)
All traps and towers gain <Highlight>{{VALUE:percent}}%</> increased attack damage for every <Highlight>1%</> health the Commander is missing.
Spanish Translation
Todas las trampas y torres obtienen un <Highlight>{{VALUE:percent}}%</> de daƱo de ataque aumentado por cada <Highlight>1%</> de salud que le falte al Comandante.