Conspire

Conspire is a keyword ability that allows the spell cast to be copied if you tap two untapped creatures that share a color with that spell. Conspire was introduced in Shadowmoor. By 2010, it was considered a design failure.

Rulings

 * If you choose to pay a conspire cost of a multicolored spell, the two creatures you tap don't need to share a color with each other. Each one just needs to share a color with the spell that has conspire.
 * You may pay a spell's conspire cost only once. (If a spell has multiple instances of conspire, you may pay each conspire cost only once.)
 * A copy created with conspire will have a conspire ability itself. However, since that copy wasn't cast, its conspire ability won't trigger. You won't get another copy.
 * The copy you create with conspire is separate from the original spell. If either one of them is countered, the other remains on the stack.
 * If conspire's triggered ability is countered (by the Scourge spell Stifle, for example), no copy will be created. The original spell will be unaffected.

Creature that grants Conspire

 * Wort, the Raidmother