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
Any land that doesnt have this supertype is a nonbasic land, even if it has a basic land type
Placing this in a deck with Gilded Goose, Witch's Oven, and Cauldron Familiar, and you'll have a pretty solid setup
The second one is Burn in the form of Creeping Chill and Conflagrate (assuming you play it)
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