The best replacement for bloodseeker is slark.

The best alternatives to bloodseeker are rated as following:
★★★★★  slark
★★★★★  antimage
★★★★★  lifestealer
★★★★  pudge
★★★★  invoker
★★★  huskar
★★★  riki
★★★  puck
★★★  phantom assassin
★★  night stalker
★★  rikimaru
★  storm spirit
★  ursa
★  mortred
★  windrunner
★  balanar
★  ironstar repeater
  ice barbed spear

Your alternative for bloodseeker is not listed? Suggest!
Speaking about bloodseeker, one probably shouldn't forget about force staff.

Other search terms related to bloodseeker and their ratings are:
★★★★★ force staff
You have in mind a companion for bloodseeker and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bloodseeker in all years. Click on graph for more.
bloodseeker
slark
antimage