
If an artifact or creature entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
Panharmonicon has 16 printings, first in Kaladesh (2016). EDHREC ranks it #272 among Commander cards. It appears most in Miirym, Sentinel Wyrm decks (11,486 on EDHREC). 2 public decks on TCG run it. It has 9 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.