If the enchanted creature is tapped as a cost to activate a mana ability, the mana ability resolves immediately, then Cryoshatter's last ability goes on the stack
It's hard to tell if this one's worth it, as the monetary value for this drop will depend entirely on how popular those new cards are - the rest are worth a pittance
(10/1/2008) If combat damage is dealt to players by multiple artifact creatures you control (including, perhaps, Sharding Sphinx itself), Sharding Sphinx's ability will trigger that many times
Condition plays a massive role in determining this card's value, and all others here, but this Umbreon can notably soar into the five-figure price range if it's a particularly clean grade copy
8/130 Hitmonchan
That means that any ramp you use in the deck needs to provide colored pips since cost reducers often make colorless mana ramp unnecessary