When Hidden Blade targets a unit protected by Sett's legend ability (which replaces death with returning to hand), does Hidden Blade still draw 2 cards?

Ruling: Yes, you still draw 2 cards from Hidden Blade even though Sett's replacement effect prevents the unit from dying. Hidden Blade only requires that it attempted a kill action against a legal target, not that the unit actually died.

Nuances:

• The key is that the unit stays on the board (returns to hand via Sett), which makes the "its controller" reference in Hidden Blade's text still valid
• If the replacement effect banished the unit instead, you would NOT draw the 2 cards because the controller reference would no longer make sense