Aside from a few cards here and there, the main difference between competitive Pioneer and competitive Explorer is that you cant play the Lotus Field combo deck in Explorer
Artifact - Tools, Toys & Mana Rocks Artifacts are colourless gadgets that fit any deck: Equipment buffs creatures, Vehicles crew into attackers, and little mana rocks like Sol Ring jumpstart your resource curve
Ready to play right out of the box, each deck contains 3 foil Legendary Creature cards
Onix was a notable Pokemon in Gen 1 as it was one of Brocks partner mons in the anime, as well as Gym Leader Brocks most important weapons in Pokemon Red, Blue and Yellow
It plays smoothly, and if you arent running one in your black deck and if graveyards are biting, this is one of my recommended solutions