It continues to give you value for a couple more turns making it even better
All the Shadowmoor creatures were costed at 1HHH (H is the symbol we use to represent "unspecified hybrid mana"), but their power and toughness varied based on how aggressive the color got to be on creatures and on what their noncreature-boosting ability was
See rule 702.138, Escape. 702.138a: Escape represents a static ability that functions while the card with escape is in a players graveyard
Spending 2 mana to kill Rhystic Study or The One Ring or 4 to handle more present threats makes Tear Asunder relevant at virtually every point of the game
While it is expensive and somewhat slow, if you can untap with it on the battlefield and a grip full of cycling cards, the game should quickly get out of hand, despite the randomness inherent in Unpredictable Cyclone
In any case, the fact that it specifically hits battles means that its user is encouraged to do so whenever strategically appropriate