Slither Blade 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

This creature can't be blocked.

Complete guide

Slither Blade is a straightforward but highly effective threat in blue tempo and aggressive decks. As a one-mana creature with built-in evasion, it provides a consistent way to apply pressure without worrying about your opponent's defensive line. Its simplicity is its greatest strength, making it a reliable enabler for combat-based triggers.

Unblockable Aggression

Slither Blade possesses a static ability that states it cannot be blocked. This means that during the declare blockers step, your opponent cannot assign any creatures to block it, regardless of their keywords or abilities. Unlike creatures with flying or menace, there are no conditions your opponent can meet to stop Slither Blade from dealing damage directly to a player or planeswalker during combat.

Resolution and Combat Steps

When you declare Slither Blade as an attacker, the game checks for any restrictions. Since its ability is continuous, the restriction is always active. Once the declare blockers step begins, the defending player must bypass Slither Blade when choosing blockers for other attacking creatures. It then proceeds to the deck damage step, where it deals damage equal to its power directly to the target it attacked.

Common Mistakes

A common misconception is that certain keywords like reach or flying can interact with Slither Blade. They cannot; 'can't be blocked' is an absolute restriction that overrides any keyword. Additionally, players sometimes forget that Slither Blade can still be targeted by spells or abilities. While it cannot be blocked, it can still be destroyed by removal spells like 'Murder' or affected by board wipes.

Strategic Implementation

The best time to play Slither Blade is on turn one to maximize the total amount of chip damage it can provide over the course of a game. It is especially potent in decks that utilize 'Saboteur' effects—abilities that trigger when a creature deals combat damage to a player—because it guarantees those triggers will resolve every turn unless the creature is removed from the battlefield.

Interaction examples

Bypassing Aerial Defenses

Ornithopter of Paradise

If your opponent controls an Ornithopter of Paradise, they might expect to block early attackers using its Flying keyword. However, when you attack with Slither Blade, its ability prevents the Ornithopter of Paradise from being declared as a blocker. Slither Blade will deal its damage directly to the opponent, ignoring the flying artifact creature entirely.

Applying Pressure Against Flash Threats

Faerie Mastermind

Even if your opponent flashes in a Faerie Mastermind to surprise you during your turn, it cannot step in front of Slither Blade. Because Slither Blade cannot be blocked, the Faerie Mastermind is forced to stay on the sidelines or block a different creature. This allows Slither Blade to consistently chip away at the opponent's life total while they hold up their Faerie for card advantage.

Guide written with AI from the official text and rulings. Official English text prevails.