Some single cards inside Japanese boxes can be volatile
Alloy Golem Altar Golem Basalt Golem Battered Golem Bosh, Iron Golem Bosh, Iron Golem Avatar Bottle Golems Boulderbranch Golem Clay Golem Coal Golem Cobalt Golem Composite Golem Crystal Golem Dross Golem Emblazoned Golem Enatu Golem Epitaph Golem Flint Golem Geode Golem Glass Golem Golem Artisan Golem Foundry Golem's Heart Golem-Skin Gauntlets Hematite Golem Hexplate Golem Howling Golem Icehide Golem Ichorplate Golem Igneous Golem Iron Golem Junk Golem Karn, Silver Golem Lead Golem Limestone Golem Lodestone Golem Malachite Golem Matopi Golem Meteor Golem Mirror Golem Mycosynth Golem Obsianus Golem Oxidda Golem Patagia Golem Pewter Golem Precursor Golem Razor Golem Reflective Golem Relic Golem Rusting Golem Saberclaw Golem Sand Golem Soldevi Golem Soultether Golem Sparring Golem Spire Golem Steel Golem Stone Golem Straw Golem Tangle Golem Thran Golem Titanium Golem Tribal Golem Ur-Golem's Eye Will-Forged Golem

The mana effect was the one that counted, and there were a lot of good reasons to want to play a deck based around it
Its basic form, Sizzlipede, is quite weak but only requires one energy to start attacking, allowing you to deal some chip damage while you gather energy to power up Centiskorch
The premium D&D set, Adventures in the Forgotten Realms , was Standard-legal, but has since rotated
With Thought-Knot Seer in the starting 60, these decks have plenty of game against Archangel Avacyn and whatever G/X Ramp deck shows up