Invoke Prejudice

Enchantment    (CMC:4)

If opponent casts a Summon spell that does not match the color of one of the creatures under your control, that spell is countered unless the caster pays an additional where X is the casting cost of the Summon spell.

LE • ENHarold McNeill

™ & © 1993—1994 Wizards of the Coast

Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

Invoke Prejudice {U}{U}{U}{U} Enchantment Whenever an opponent casts a creature spell that doesn't share a color with a creature you control, counter that spell unless that player pays {X}, where X is its converted mana cost.

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10/4/2004
In a multi-player game, it affects all opposing players.
10/4/2004
This ability triggers when the spell is cast.

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Card Invoke Prejudice is not on TCGPlayer.