Mox Diamond was an attempt to print a balanced Mox, and I was as surprised as anyone that it worked
Beluna Grandsquall makes for a Legendary Adventurer, capable of milling your adventures into your hand
One point to clear up first: that $954,800 result and a separate $550,000 sale are two different copies sold at two different auctions, not the same card quoted twice
Turn / Burn Turn / Burn can deal with any creature when fused (including indestructible ones) and is an excellent tool for dealing with big threats
So,every time you cast an instant, sorcery, or aura that targets a creature with Heroic, its ability will trigger, granting you a powerful benefit