Harmless Assault 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
Prevent all combat damage that would be dealt this turn by attacking creatures.
Complete guide
Harmless Assault is a powerful defensive tool designed to neutralize aggressive strategies during the combat phase. By turning a lethal charge into a toothless maneuver, this white instant ensures your life total remains untouched by the primary threat. Understanding the distinction between attacking and blocking damage is key to mastering this card.
What It Does
Harmless Assault creates a continuous effect that lasts for the remainder of the turn. It specifically targets combat damage dealt by creatures that have been declared as attackers or have entered the battlefield attacking. This effect does not affect non-combat damage, such as abilities that deal damage directly to players or creatures.
How It Resolves
When you cast Harmless Assault, it enters the stack and, upon resolution, sets up a prevention shield. During the combat damage step, any creature currently designated as an 'attacking creature' will deal zero damage. Crucially, this effect applies to all attacking creatures, even those that might be added to combat after the spell has already resolved.
Common Mistakes
The most common error is assuming that Harmless Assault prevents all damage during the combat phase. According to the official rulings, combat damage dealt by blocking creatures is not prevented. If you block an opponent's creature, your creature will still deal its damage to their attacker, but their attacker will deal no damage back to your blocker or to you.
When to Play It
This spell is best utilized when an opponent commits to a large-scale 'alpha strike.' By waiting until the declare blockers step, you can safely block their most dangerous threats; your creatures will survive the encounter and potentially destroy the attacking creatures, while you take no damage in return.
Interaction examples
Generous GiftIf your opponent attacks you with the 3/3 Elephant token created by Generous Gift, you can cast Harmless Assault. The Elephant is an attacking creature, so its combat damage is prevented. If you block the Elephant with a creature of your own, your blocker will deal damage normally, potentially destroying the token without taking any damage itself.
Teferi's ProtectionIf you are facing an overwhelming board, you might consider your options between Harmless Assault and Teferi's Protection. While Teferi's Protection prevents your life total from changing, Harmless Assault allows your creatures to remain on the battlefield to block. If you cast Harmless Assault, your creatures stay and can deal damage to attackers, whereas Teferi's Protection would cause them to phase out, meaning they could not deal any damage to the opponent's forces.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Harmless Assault
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Combat damage dealt by blocking creatures isn’t prevented.
No other card is named in this ruling.
Legal formats
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Meta decks with Harmless Assault
No archived Top 8 deck with this card yet.