5 cards where the set is “plc” and the card types include “dragon”

Intet, the Dreamer (Planar Chaos #158)
Numot, the Devastator (Planar Chaos #160)
Oros, the Avenger (Planar Chaos #161)
Teneb, the Harvester (Planar Chaos #163)
Vorosh, the Hunter (Planar Chaos #164)

This search is finished. Now the real work can begin.