Gulf SquidHow it works & interactions with other cards

What it Does

Gulf Squid has a single 'enters' triggered ability. When it successfully enters the battlefield from any zone, you choose a target player. That player must then tap every land they currently control. This affects all lands, regardless of whether they are basic or non-basic, and even if they are currently creatures or other card types.

How it Resolves Step by Step

First, Gulf Squid enters the battlefield, causing its ability to trigger. Second, you place the trigger on the stack and choose a target player. Third, players have a chance to respond; the targeted player can tap their lands for mana in response to the ability. Finally, if the ability resolves, all currently untapped lands that player controls are tapped.

Common Mistakes

A frequent error is assuming this prevents an opponent from casting spells for the rest of the turn. Because players can respond to the trigger, your opponent can tap their lands to add mana to their mana pool before the Squid's ability resolves. Additionally, this ability only taps lands present on the battlefield at the moment of resolution; lands played later in the turn will remain untapped.

When to Play it

The most effective time to play Gulf Squid is usually during your opponent's Upkeep step. This forces them to spend their mana during their beginning phase or lose it as the phase ends, effectively preventing them from casting sorcery-speed spells during their Main Phase. Alternatively, play it during your own turn to tap out a blue player before you cast a game-winning spell to avoid countermagic.

Interaction examples

Doubling the Disruption

Roaming Throne

If you control Roaming Throne with 'Squid' or 'Beast' chosen, Gulf Squid's ability triggers twice when it enters. You can target the same player twice or two different players. If you target the same player, the second trigger is usually redundant unless they have a way to untap lands in between the two resolutions.

Mana Management

Solemn Simulacrum

If you use Solemn Simulacrum to put a basic land onto the battlefield tapped, and then play Gulf Squid targeting yourself, that new land will already be tapped. Gulf Squid only affects lands you currently control on the battlefield; it does not interact with the land search from the Simulacrum directly, but it ensures your mana base is fully exhausted if you are trying to trigger 'whenever a land becomes tapped' effects.