Dispersal ShieldHow it works & interactions with other cards

Evaluating the Shield

Dispersal Shield checks the mana value of target spell against the highest mana value among permanents you currently control. Mana value is determined by the total amount of mana in a card's casting cost, regardless of color. If you control a permanent with a mana value of 5, you can counter any spell with a mana value of 5 or less. Tokens usually have a mana value of 0 unless they are copies of another permanent.

Resolution and Timing

The spell's condition is checked only when Dispersal Shield attempts to resolve. When you cast it, you must choose a legal target spell. As Dispersal Shield resolves, it looks at the permanents you control at that exact moment. If your largest permanent was removed in response to Dispersal Shield, the spell may fail to counter the target if your new highest mana value is now lower than the target's mana value.

Common Pitfalls

A common mistake is forgetting that Dispersal Shield itself must still be able to target the spell. Unlike some counters, this is not restricted to noncreature spells, but it is restricted by math. If you control no permanents, the 'greatest mana value' is treated as 0, meaning you could only counter spells with a mana value of 0 (like a zero-cost artifact or a suspended spell). Always ensure your board presence outweighs the opponent's threat before relying on this shield.

When to Cast It

This card is most effective in 'Stompy' or Midrange decks where you naturally play creatures with high mana values. It serves as an efficient two-mana answer to late-game threats, provided you have already established a presence. It is less reliable in control decks that run few permanents, as an opponent can resolve removal on your one creature to 'turn off' your Dispersal Shield while it is on the stack.

Interaction examples

Matching the Value

Counterspell

Suppose your opponent casts Counterspell (mana value 2). If you control a creature with a mana value of 2 or higher, you can cast Dispersal Shield targeting Counterspell. Upon resolution, the game checks your board; since you have a permanent with mana value 2, the condition is met and Counterspell is countered.

Responding to Removal

An Offer You Can't Refuse

Your opponent casts An Offer You Can't Refuse (mana value 1) targeting your enchantment. You respond with Dispersal Shield, currently controlling a land (mana value 0) and a creature (mana value 3). If your opponent then destroys your creature in response, when Dispersal Shield resolves, your highest mana value is 0. Since 1 is not less than or equal to 0, Dispersal Shield resolves but fails to counter the spell.