Gholli's Gruesome Brew

Gholli's Gruesome Brew enters the battlefield with 3 dose counters on it.
{2}{b/g}, Remove a dose counter: Search your library for a basic land and put it in to play tapped, then shuffle your library.
{6}{b/g}{b/g}, Remove 3 dose counters: You get an emblem that says "Whenever you tap a land for mana, add 3 times that mana to your mana pool and lose 3 life. Exile Gholli's Gruesome Brew.