Flanking

When you and an ally are flanking a foe, it is off-guard (taking a –2 circumstance penalty to AC) against your melee attacks.

To flank a foe, you and your ally must be on opposite sides of the creature. A line drawn between the center of your space and the center of your ally’s space must pass through opposite sides or opposite corners of the foe’s space. Additionally:

• •Both you and the ally must be able to act
• •You must be wielding melee weapons or able to make unarmed attacks
• •You can’t be under effects that prevent you from attacking
• •The enemy must be within your melee reach

Avoiding Flanking

Movement: Stride away to break the flank — often worth the action.

All-Around Vision: Some monsters are immune to flanking.

Deny Advantage: Some classes (e.g. rogue) can gain deny advantage, preventing flanking unless the flanker’s level exceeds the creature’s.

Tiny creatures (reach 0 ft.) cannot flank unless they have a reach weapon or unarmed attack with reach greater than 0 ft.