What counts as identical for grouping: name, power/toughness, counters, abilities, tapped state, damage, and the absence of attachments must all match
Then River Song deals damage to that player equal to its power. Being able to make River Song stronger when players mess with their deck is one thing, but being able to also hurt players for doing so is excellent
The error was caught by management when they checked the proof sheets
Overlord of the Balemurk Duskmourn MR Overlord Overlord of the Balemurk is great because it mills four cards as early as turn two, which is stellar for graveyard shenanigan decks
Champions Helm Chief: Ive predicted that this card would get a reprint multiple times in the past, so its good to finally see it