Slow is a Debuff which the Giant Head always begins the fight with. Can also be applied to all enemies in a Daily Modifier.
Effect 
Edit
For every card you have played this turn, enemy takes 10% more damage from Attacks, not compounding.
Slow resets at end of turn; enemy does NOT carry over stacks of Slow from turn to turn.
Only applies to damage caused by playing Attack cards.
Ex) If you play 2 cards, Attacks deal 20% extra damage; 5 cards, 50%; 11 cards, 110%; etc.
