Gumato 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

Vigilance (Attacking doesn't cause this creature to tap.) : Add .

Complete guide

Gumato is a powerhouse creature that combines defensive utility with massive mana acceleration. As an Ape Beast with Vigilance, it can pressure opponents in combat while remaining ready to fuel your biggest spells during your post-combat main phase.

Dual-Purpose Dominance

Gumato features two highly synergistic abilities: Vigilance and a powerful mana-tapping ability. Because attacking does not cause Gumato to tap, you are free to declare it as an attacker and then use its activated ability later in the same turn, either during combat after blocks are declared or in your second main phase.

Generating Massive Mana

The activated ability of Gumato allows you to tap it to add three Green mana ({G}{G}{G}) to your mana pool. This is an activated ability, not a triggered one, meaning you can activate it any time you have priority, provided Gumato is not affected by summoning sickness.

Strategic Timing and Common Mistakes

A common mistake is forgetting that Gumato can tap for mana even if it is currently blocking. Once you have declared it as a blocker, you can tap it to add mana before the combat damage step. Note that tapping a creature after it has been declared as a blocker does not remove it from combat or prevent it from dealing damage.

Synergy and Type Bonuses

Since Gumato has two creature types, Ape and Beast, it benefits from any effects that check for either of those categories. This makes it a versatile inclusion in decks that care about specific tribal synergies or creature-based mana production.

Interaction examples

Mana Acceleration with Solemn Simulacrum

Solemn Simulacrum

You play Solemn Simulacrum to fetch a basic forest, ensuring you have the mana to cast Gumato next turn. Once Gumato is on the field, you can attack for damage thanks to Vigilance, then tap Gumato to produce three Green mana, providing enough resources to cast multiple spells or activate expensive abilities in a single turn.

The Type Synergy Limit

Roaming Throne

If you cast Roaming Throne and choose 'Ape', it will gain the Ape subtype. However, it is important to note that Roaming Throne only doubles triggered abilities. Because Gumato's mana production is an activated ability (signified by the colon), Roaming Throne will not cause Gumato to produce extra mana.

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