Dota Spress

Every time you kill an enemy hero you are awarded with
CurrentStreakOfDyingHero+200+DyingHeroLevel*5
Where current streak is:

* 0 if the hero has no kills since last respawn
* 0 if the hero has killed another hero and not died yet
* 0 If the hero has two kills in a row
* 50 Killing Spree (Three kills in a row)
* 100 for Dominating ( Four kills in a row)
* 150 Mega Kill! ( Five kills in a row)
* 200 Unstoppable! ( Six kills in a row)
* 250 Wicked Sick( Seven kills in a row)
* 300 Monster Kill!!! ( Eight kills in a row)
* 350 Godlike! (Nine kills in a row)
* 400 Beyond Godlike! (Ten to infinite kills in a row)

Source : Kuarinofu