This is extra-ordinary if you have a big graveyard gives you allot of life, so wait as you can to play it. Remember it has flashback.
With the Aven Archer's Ability you can destroy stronger creatures that are attaching or defending creatures.
This is great if you are losing Balancing Act can even the odds of it all.
The Blessed Orator is a strong creature that benefits your creatures because they gain a total of +0/+1 for each one in play.
Once the Graceful Antelope is able to get thought to the life points in is virtually impossible to stop it.  And you can turn all the mana to plains.
If you have no or not many creatures, but your opponent has a lot more than you this will help to add to the graveyard if you know what I mean.
For all of the Life Burst you gain life that could in the long run mean allot. 
A Flying 3/5 after threshold is not easily killed since most creatures are 2/2 if they have flying.

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