Heartbeat of SpringHow it works & interactions with other cards

A Symmetrical Mana Boost

Whenever any player taps a land for mana, Heartbeat of Spring triggers and adds one additional mana of any type that the land just produced. This effect applies to all players, meaning your opponents will also benefit from the extra mana on their turns. Note that this is a triggered ability that goes on the stack; it is not a mana ability itself, though it produces mana upon resolution.

Choosing Your Type

If a land produces multiple types of mana simultaneously, the player who tapped the land chooses which one of those types Heartbeat of Spring adds. The 'types' of mana in Magic are white, blue, black, red, green, and colorless. Crucially, any restrictions or 'riders' on the original mana—such as 'spend this mana only to cast a Creature spell'—do not carry over to the extra mana provided by Heartbeat of Spring.

Step-by-Step Resolution

First, a player activates a mana ability of a land they control by tapping it. That player gets the mana from the land immediately. Second, Heartbeat of Spring's ability triggers and is put onto the stack. Third, when the trigger resolves, that player adds one mana of a type produced by the land to their mana pool. Because the extra mana comes from a triggered ability, there is a brief moment where players can respond before the extra mana is available.

When to Deploy

Since Heartbeat of Spring helps everyone, the best time to play it is usually when you can immediately utilize the extra mana to establish a dominant board state. If you cast it and pass the turn without using the extra resources, you give your opponents the first opportunity to use their doubled mana to potentially win the game or destroy your enchantment.

Interaction examples

Fueling the Library

Sylvan Library

With Heartbeat of Spring on the battlefield, your Forest now produces two green mana. This allows you to easily keep up with the high mana demands of your deck while using Sylvan Library to dig deep for threats. The extra mana ensures you can cast the additional cards you draw without falling behind on tempo.

Stomping Ground Preparation

Garruk's Uprising

By playing Heartbeat of Spring, you double your mana output to cast large creatures that trigger Garruk's Uprising. For example, if you have four lands, you effectively have eight mana available. You can cast Garruk's Uprising and still have plenty of mana left over to summon a high-power creature, drawing a card immediately and giving your team trample for a lethal swing.