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Shatter the Source (164)

MOM · March of the Machine · common

Mana cost
Mana value	6.0
Type	Instant
Rarity	common
Colors	R
EDHREC rank	14341

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Choose one — • Shatter the Source deals 6 damage to target creature, planeswalker, or battle. • Destroy target artifact.

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March of the Machine $0.31

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Legality

Rulings

• 2024-01-12: You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.
• 2024-01-12: If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.
• 2024-01-12: Because convoke isn't an alternative cost, it can be used in conjunction with alternative costs.
• 2024-01-12: Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.
• 2024-01-12: Tapping a multicolored creature using convoke will pay for {1} or one mana of your choice of any of that creature's colors.
• 2024-01-12: When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.

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