Synapse Sliver 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
Whenever a Sliver deals combat damage to a player, its controller may draw a card.
Complete guide
Synapse Sliver is a powerful engine for Sliver decks, turning every successful attack into fresh resources. As a blue member of the Sliver hive, it translates the collective's aggressive combat presence into raw card advantage.
What it Does
Synapse Sliver grants a triggered ability to all Sliver creatures on the battlefield. Whenever a Sliver deals combat damage to a player, the player who controls that specific Sliver may choose to draw a card. This effect is cumulative; if multiple Synapse Slivers are on the battlefield, each combat damage event will trigger each instance of the ability separately.
How it Resolves
When a Sliver you control deals combat damage to an opponent, the ability triggers and is put onto the stack. Since the ability uses the word 'may,' you choose whether or not to draw the card at the moment the ability resolves. If you control multiple Slivers that deal combat damage simultaneously, you get a separate trigger for each Sliver that connected.
Common Mistakes
Players often forget that this ability only triggers on combat damage, not any damage dealt by Slivers (such as through activated abilities). Additionally, remember that if a Sliver's type is changed by an effect so it is no longer a Sliver, it loses the benefit of Synapse Sliver immediately. Conversely, any creature that gains the Sliver type will start triggering this ability upon dealing combat damage.
When to Play It
Synapse Sliver is best played when you have an established board of Slivers but need to refill your hand to maintain pressure. It forces opponents into difficult blocking decisions, as allowing even a small Sliver through results in card draw for you.
Interaction examples
Roaming ThroneIf you have Roaming Throne on the battlefield with 'Sliver' chosen as the type, it becomes a Sliver itself. Because Synapse Sliver is a Sliver, Roaming Throne's ability causes Synapse Sliver's triggered ability to trigger an additional time whenever a Sliver deals combat damage to a player. If Synapse Sliver deals combat damage to a player, you will get two triggers, potentially drawing two cards.
Solemn SimulacrumIf you use an effect to make Solemn Simulacrum a Sliver, it will trigger Synapse Sliver when it deals combat damage to a player. Note the difference in timing: Solemn Simulacrum draws a card only when it dies, whereas the ability granted by Synapse Sliver provides card draw immediately after the combat damage step.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Synapse Sliver
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Abilities that Slivers grant, as well as power/toughness boosts, are cumulative. However, for some abilities, like flying, having more than one instance of the ability doesn’t provide any additional benefit.
No other card is named in this ruling.
- #2· Wizards of the Coast
If the creature type of a Sliver changes so it’s no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.
No other card is named in this ruling.
Legal formats
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Meta decks with Synapse Sliver
No archived Top 8 deck with this card yet.