Sanctum of Fruitful HarvestHow it works & interactions with other cards

Harnessing the Harvest

Sanctum of Fruitful Harvest features a triggered ability that fires at the beginning of your pre-combat main phase. When the ability resolves, you check the number of permanents you control with the 'Shrine' subtype. You then choose one color of mana and add a quantity of that mana to your mana pool equal to the number of Shrines found. Because this is a triggered ability and not a mana ability, it uses the stack and can be responded to by opponents.

Step-by-Step Resolution

First, the ability triggers as you transition from your draw step to your first main phase. Second, as the ability resolves, the game counts your Shrines; this count includes Sanctum of Fruitful Harvest itself. Third, you choose a single color (White, Blue, Black, Red, or Green). Finally, the mana is added to your mana pool. Remember, this mana will disappear if not spent before you move to your combat phase or second main phase.

Common Pitfalls

A frequent mistake is counting cards that have the word 'Shrine' in their name but lack the actual 'Shrine' enchantment subtype. For example, land cards like Jungle Shrine or artifacts like Luxa River Shrine do not contribute to the X value. Additionally, since this is a legendary enchantment, controlling two copies of Sanctum of Fruitful Harvest will trigger the Legend Rule, forcing you to put one into the graveyard before the main phase trigger can even occur.

When to Play It

Ideally, you want to cast this on turn three to begin generating mana immediately on turn four. It is most effective when you have other Shrines in hand or on the board to maximize the X value. Since the mana is generated at the start of the main phase, it is perfect for casting high-cost enchantments or creatures during that same phase.

Interaction examples

Establishing the Engine

With only Sanctum of Fruitful Harvest on the battlefield, the ability will trigger at the start of your first main phase. The game counts one Shrine, allowing you to add one mana of any color. This effectively makes the card a repeatable source of mana ramp.

Filtering for Answers

Sylvan Library

During your draw step, Sylvan Library allows you to see more cards to find additional Shrines. Immediately after, as you enter your first main phase, Sanctum of Fruitful Harvest triggers. You can use the mana generated by the Sanctum to help pay for any high-cost spells you just drew with the Library.

Setting Up Big Plays

Garruk's Uprising

If you control Sanctum of Fruitful Harvest and two other Shrines, you will add three mana of any one color at the start of your main phase. You can use this mana to cast a large creature. If Garruk's Uprising is on the field and that creature has power 4 or greater, you will also draw a card, combining mana ramp with card advantage.