Rumbling Ruin is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
When this creature enters, count the number of +1/+1 counters on creatures you control. Creatures your opponents control with power less than or equal to that number can't block this turn.
How it works : Rumbling Ruin
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
The number of +1/+1 counters among creatures you control is counted only as Rumbling Ruin’s ability resolves. The set of creatures that can’t block is constantly updated as their power changes, but the number against which their power is compared doesn’t change later in the turn, even if the number of +1/+1 counters among your creatures changes.
No other card is named in this ruling.
- #2· Wizards of the Coast
Once a creature with high enough power has blocked, changing the power of the blocking creature won’t remove the blocking creature from combat or cause the creature it blocked to become unblocked.
No other card is named in this ruling.
- #3· Wizards of the Coast
If there are no +1/+1 counters on creatures you control as Rumbling Ruin’s ability resolves, creatures with power 0 or less can’t block this turn.
No other card is named in this ruling.
Legal formats
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Meta decks with Rumbling Ruin
No archived Top 8 deck with this card yet.




