01Let their end step beginThe delayed trigger Goryo creates looks for the next end step. Once this one has started, that is your own, a full turn away.
→
02Crack the fetchlandHold it until here. Cracking it on your own turn spends the flexibility for nothing.
→
03Find a surveil dualMeticulous Archive, Shadowy Backstreet or Undercity Sewers, whichever colours the next turn needs.
→
04Resolve the surveilPut Atraxa or Griselbrand into the graveyard if it is there.
→
05Cast Goryo before leaving the end stepThe shorter the gap between the target arriving and the spell being cast, the less room graveyard interaction has.
→
06Untap with the creatureA full attack, and a turn to find Ephemerate or Consign.
Rules noteA fetchland held for their end step is a conditional instant-speed way to bin the target and untap with the result.
Strategic purposeTurns the mana base into a discard outlet and buys a whole turn cycle with the creature.
Failure conditionsThey can respond with graveyard interaction once the surveil trigger has resolved, before Goryo is cast.