Flooded GroveHow it works & interactions with other cards

What Flooded Grove Does

Flooded Grove is a land that offers two distinct mana abilities. First, it can simply be tapped to add one colorless mana ({C}) to your mana pool. Second, it has a filter ability: by paying one hybrid Green or Blue mana ({G/U}) and tapping the land, you produce two mana in any combination of Green and Blue ({G}{G}, {G}{U}, or {U}{U}).

How it Resolves Step by Step

Using Flooded Grove is straightforward but requires you to have an initial source of colored mana. Step one: Activate a mana ability from another source to add either {G} or {U} to your mana pool. Step two: Announce you are activating the filter ability of Flooded Grove. Step three: Pay the cost by tapping Flooded Grove and spending that one {G} or {U}. Step four: Choose one of the three output options—{G}{G}, {G}{U}, or {U}{U}—and add that mana to your pool.

Common Mistakes

The most common error is forgetting that Flooded Grove cannot produce colored mana on its own. If it is the only land you control, or if you have no other sources of Green or Blue mana, you are restricted to producing only colorless mana. Additionally, remember that the hybrid cost can be paid with either {G} or {U}; you do not need both to activate the filter.

When to Play It

Play Flooded Grove in decks that feature heavy requirements for both Blue and Green, such as spells costing {U}{U}{U} or {G}{G}{G}. It is especially effective in multi-color decks where you might have plenty of one color but need to 'convert' it to another to stay on curve.

Interaction examples

Filtering for Specific Colors

Command Tower

If your Commander is Green and Blue, you can tap Command Tower for {G}. You then use that {G} to pay for Flooded Grove's filter ability, tapping Flooded Grove to add {U}{U}. This effectively turns your single Green mana into two Blue mana.

Leveraging Opponent's Lands

Exotic Orchard

If an opponent controls a Forest, your Exotic Orchard can tap for {G}. You can then spend that {G} to activate Flooded Grove, giving you access to {G}{G}, {G}{U}, or {U}{U}, even if you don't naturally own a source of Blue mana yourself.

Early Game Stabilization

On turn one, you play Flooded Grove. Since you have no other mana sources, you tap it for {C} to cast a colorless spell or a generic mana cost. On turn two, you play a Forest, which allows you to then use Flooded Grove's second ability to generate {U}{U} for a counterspell.