Although you can call it a precon upgrade, my build is more a precon remake than an upgrade so you can start from zero and buy singles
Then discard a card unless there are three or more Lesson cards in your graveyard
Sacrificing three other artifacts can be a lot, but the Forgemaster can sacrifice itself to make it easier
When it enters the battlefield or dies, you get to exile a permanent
Good sacrifice targets usually fit one of these categories: Enters value: creatures like Solemn Simulacrum or Elvish Visionary that already replaced part of their cost Dies value: creatures with death triggers, recursion, or graveyard payoffs Mana value 3 or 4 creatures: these create the best early Emerge curve Artifact fodder for Emerge from artifact: eggs, Wellsprings, Clues, Blood tokens, and similar pieces Recursive creatures: threats that come back from graveyard or exile Creatures you wanted in the graveyard anyway: because some decks treat the graveyard like a second hand with worse lighting The practical sweet spot is often mana value 3 or 4
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