Arena of Glory You can go entire Swiss tournaments without ever activating the haste ability on Arena of Glory, but the opportunity cost is so low that when you do activate it you feel like you're getting away with something
Whenever Sephiroth enters or attacks, you may sacrifice another creature
When these two work together, your opponent is forced to take Moana out all at once rather than chip away at her Willpower, which can be difficult to do
With haste and trample, it can come out of nowhere and eat a big hole in someones graveyard, making it large enough to do even worse damage the next turn
Dredge has three creatures that it can return from the graveyard: Bloodghast: A potentially hasty creature that can return to the battlefield via landfall triggers
Really ought to be more than a 1/1, I'd think