The examples in the OP from Lorwyn/Shadowmoor block are great for Rebecca Guay, because the general feel of those sets involved a lot of dreamlike and traditional fairy-tale type stuff
Also, there are situations where you dont want to trigger Prized Amalgam, for instance, you play around Ugin minus ability or vs Anger of the Gods and you have Silversmote Ghoul/another Amalgam triggered to return at your endstep, or fetchland + Bloodghast ready to return your 3/3s on the opponents endstep
Placing this in a deck with Gilded Goose, Witch's Oven, and Cauldron Familiar, and you'll have a pretty solid setup
Vintage, Legacy, Modern, Standard, Draft, Lightning Bolt is one of the best cards in every format that comes in contact with the card
Nemesis of Mortals This has always struck me as one of the great names and concepts from Theros Block