Without something like Memnite to combine with it, I cant imagine it shows up in anything more than a rogue deck or two
We now have a back-up Worm Harvest in Lluwen, Imperfect Naturalist, which staples the effect to an activated ability
Prey Upon isn't always good enough, so it's nice that you can give your opponent a Fish in situations where you need a little something extra
"Dash [cost]" means "You may cast this card by paying [cost] rather than its mana cost," "If this spell's dash cost was paid, return the permanent this spell becomes to its owner's hand at the beginning of the next end step," and "As long as this permanent's dash cost was paid, it has haste." If you choose to pay the dash cost rather than the mana cost, you're still casting the spell
All you really need is one untapped land, our friendly troll, and either Reanimate or Animate Dead to have this on the battlefield as early as turn 2