Whipsaw

 is an active skill that is automatically learned by Reapers upon completing the and is able to be ranked up at later levels.

Rank table
To upgrade to the next rank, one must reach the required level. All the reaper skill upgrades are free. Rank I is obtained as a quest reward.

Glyphs
To glyph, a glyph must be unlocked and the character must spend points to activate it. At level 65, a character has 55 glyph points available to spend on all available reaper glyphs. Most glyphs are unlocked automatically as the character gains levels, while Master Glyphs must be obtained as drops from dungeons.