This is essentially a continuation of Tarkir: Dragonstorms Flurry ability, albeit not keyworded as such
The thing with these three enchantments is that you can actually get away without any sac outlets at all
"I will Giant Growth my Phyrexian Hydra, and Soul's FI-YA!" #3 - Goblin Grenade Before Fling, there was Goblin Grenade
Muddle the Mixture Merchant Scroll Mystic Tutor Enlightened Tutor Worldly Tutor Wild Research Summoner's Pact Eladrami's Call There are of course a whole selection of tutor cards across all the colours, none come close to Vampiric or Demonic
Access to removal is big for Emerald while keeping tempo, but discard or strength buffs will always have a place
Graveyard Trespasser's primary utility comes in the form of graveyard hate, exiling a card from an opponent's graveyard whenever it enters the battlefield or attacks, draining that card's owner for one life if it's a creature