BUG: Coram, the Undertaker attack causes Commander game to exit
I am playing a 4-player Commander game against 3 AI opponents using Coram, the Undertaker as my commander.
Reproduction sequence:
1. Coram, the Undertaker was on the battlefield as a 0/5.
2. I declared Coram as an attacker.
3. Coram's attack trigger resolved correctly and each player milled a card.
4. One of the milled creature cards caused Coram's power to update correctly from 0/5 to 2/5.
5. I advanced combat toward the Declare Blockers / Combat Damage portion of combat.
6. At that point Neo Forge abruptly exited the game.
There was no winner, loser, draw, or other game-ending result shown. The game simply closed/exited back out of the match.
I am not completely certain whether the exit occurred immediately upon entering Declare Blockers or when it automatically advanced through blockers because nobody blocked, but it occurred immediately after the Coram attack/mill sequence while combat was advancing.
The milling itself appeared to resolve correctly and Coram's power updated correctly before the failure.
This is particularly important for Coram because his attack trigger is a central part of how the commander functions.
I am using the current Windows Neo Forge download as of September 8, 2026.
Please let me know if there is a log file I can provide or a specific test you would like me to run to help reproduce it.