Barrier of Bones Carrion Wall Cemetery Gate Concealing Curtains Demon Wall Drift of the Dead Fire Navy Trebuchet Gibbering Barricade Moaning Wall Mordor Trebuchet Wall of Blood Wall of Bone Wall of Corpses Wall of Distortion Wall of Limbs Wall of Putrid Flesh Wall of Shadows Wall of Souls Wall of Tombstones Wall of Vipers
Synchro of Unity is more Synchro Summoning-focused, using cards such as Speed Warrior for more simplistic coverage
Mega Venusaur ex and Meganium is my current favorite as Meganiums Wild Growth ability doubles the value of grass energy, making it a piece of cake building up energy-hungry Pokmon like Venusaur ex to land decisive blows quickly
D&D tropes and items have found ways to make their way into the game one way or another, either through tournament-legal cards like Bag of Holding or silver-bordered crossover cards like Sword of Dungeons & Dragons
many old Pokemon collectors remember this card, had this card and played with this card
Efficiency will come from experience in grading, and understanding what different conditions equate to on the grading scale