Lightning Crafter

Champion is a strange piece of design: it reads like a drawback but functions as a socket. The clause forces you to exile another Goblin or Shaman on entry, or the creature dies, and that exiled card snaps back the moment the Crafter leaves play. On its own that is a wash, a creature for a creature with a tap ability that throws three damage anywhere. The trick is what happens when you blink or bounce the Crafter on purpose. The championed creature returns with its enter-the-battlefield trigger fresh, the Crafter resets to untapped, and you are now generating value off a body you were going to deploy anyway, stacked on top of a repeatable burn outlet. The champion text is doing both jobs at once: it is the entry cost (you must control and tuck away another tribesman) and the recursion payoff (a free flicker socket every time this dies or leaves). The 3/3 body is incidental; the timing window is the point. A sacrifice effect or a flicker spell turns a four-mana pinger into a value engine, because the exiled Goblin or Shaman re-triggers on every reset. Plenty of enter-the-battlefield creatures in those tribes gain a second life here, and the Crafter happily borrows their triggers in exchange for hiding them until it leaves. It hides a combo-forward engine behind the silhouette of a repeatable burn creature.