Whenever Primeval Titan enters the battlefield or attacks, you may search your library for up to two land cards, put them onto the battlefield tapped, then shuffle
Like most Magic: The Gathering cards, the value of Quietus Spike depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Shards of Alara)
Mana acceleration is also fair game, so we can include a card that consistently generates enough Treasure tokens to be considered pseudo-mana ramp
Most of the upgrades to the deck involve removing subthemes that contribute little to the song strategy, and replace them with more efficient cards
You also don't really care about the nibble damage or the unblockable dork as other lists will do