sacrifice eumidian hatchery using Hearthhull, the Worldseed and this error message popped up

Error type: SERVER - game error

Client version: 1.4.58-V2-grath-weekly (build: 2026-05-21 14:24)
Java version: 1.8.0_201
Default charset: UTF-8

Game end on critical error: mage.MageException: Error in unit tests

mage.MageException: Error in unit tests
Server version: 1.4.58-V2-grath-weekly (build: 2026-05-14 15:01)
Stack trace:
mage.game.GameImpl.playPriority(GameImpl.java:1813)
mage.game.turn.Step.priority(Step.java:73)
mage.game.turn.Phase.playStep(Phase.java:205)
mage.game.turn.Phase.play(Phase.java:91)
mage.game.turn.Turn.play(Turn.java:132)
mage.game.GameImpl.playTurn(GameImpl.java:1180)
mage.game.GameImpl.play(GameImpl.java:1087)
mage.game.GameImpl.start(GameImpl.java:1063)
mage.server.game.GameWorker.call(GameWorker.java:35)
mage.server.game.GameWorker.call(GameWorker.java:16)
java.util.concurrent.FutureTask.run(FutureTask.java:266)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Start by reproducing the sacrifice involving Eumidian Hatchery, Hearthhull, and the Worldseed, then trace the reported path from mage.game.GameImpl.playPriority through Step.priority and Phase.playStep. Done means identifying the cause of the MageException during this action and confirming the game no longer ends in a critical error.

Written by the indexing model from the issue text.