If an effect instructs you to sacrifice it, you can't and it remains on the battlefield
As many times as you want, provided that you have enough energy counters to use the ability
Still, if you build black-green deck around graveyard recursion and try really hard, the payoff is incredibly fun to pull off
The goal is usually to put a bunch of even-cost clones in your deck - such as Phyrexian Metamorph, Spark Double, Phantasmal Image, etc
This is far better in a pure ramp deck where you will much more reliably have spare lands and resources to throw away or perhaps more need of dealing with specific things
Illustrated by: Mark Poole Multiverse ID: 256 Not Legal Traditional Standard Not Legal Traditional Alchemy Not Legal Traditional Explorer Not Legal Traditional Historic Not Legal Traditional Timeless Rulings 2004-10-04 If the replacement effect is applied, the effect will continue until your next turn even if this card leaves the battlefield