Sneaking
Hero ability
Sneaking. The monsters in front of you never block you: you can use the Market, and with your weapons you choose whether to hit the monsters or your opponent.
Heroes with this ability
Thief 
Raider 
Naga 
Dark Elf 
Druid Cards with this ability 1
Frequently asked questions
If I put the monster in front of me to Sleep, can I attack my opponent?
Yes. A sleeping monster doesn't block: you can use the Market, and with your weapons you choose whether to hit it or your opponent. If you attack it, it wakes up.