Despite what many may initially perceive about green's large size and late-game potential, Green has access to numerous incredible spells that only cost a single mana
a deck that's trying to get to five mana faster than everyone else isn't doing it with Boundless Realms
If the cunning yet forgetful opponent snatches control of your Gifts Ungiven and doesnt change the target, he will get a surprise: Gifts Ungiven will fizzle
You need fewer cards in the graveyard per activation (albeit more specific cards), it has the same activation cost, it will typically deal more than two damage per activation, it will get larger over time, and it has menace
1 Elvish Rejuvenator
To make things even better, Grasp of Darkness is an instant, meaning that we can accrue big advantages by using it during combat or simply find other ways to put our mana to work when that killable threat on the other side of the table just hasn't been played yet