The mirror match is decided by who resolves Goblin Lackey first and who gets the better Goblin Ringleader chains — tempo and card advantage are everything. Goblin Sharpshooter is the most impactful card in the mirror, as it can wipe the opponent's entire board of small Goblins while your own creatures survive if managed carefully. Pyrokinesis comes in as free interaction to kill a Lackey on the play or neutralize a Sharpshooter your opponent resolves first. Goblin Tinkerer has no relevant artifacts to destroy in the mirror and Goblin King's mountainwalk ability is largely irrelevant in a race, making them the cleanest cuts. Keep your mana denial plan — Rishadan Port and Wasteland — active, as disrupting the opponent's mana to prevent a Warchief or Ringleader activation can swing the game decisively.