Quickstrike Poisoner

Rush 4 - {g}(You may cast this spell for it's rush cost, if you do exile the top four cards of your library.)
Deathtouch
You may cast this spell for it's rush cost as though it had flash, if you do sacrifice it at the beginning of the next end step.
If Quickstrike Poisoner wasn't rushed it comes into play with three +1/+1 counters on it.