Lunar Mystic

Creature — Human Wizard    (CMC:4)

Whenever you cast an instant spell, you may pay . If you do, draw a card.

"I'm pleased this world has learned the moon affects more than the tides." —Tamiyo, the Moon Sage

115 C20 • ENWesley Burt

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Modern,Extended,Innistrad Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Tribal Wars Standard,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Lunar Mystic {2}{U}{U} Creature — Human Wizard Whenever you cast an instant spell, you may pay {1}. If you do, draw a card. 2/2

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5/1/2012
The triggered ability will go on the stack on top of the instant spell and resolve before it.
5/1/2012
The decision to pay  is made when the triggered ability resolves. It's not an additional cost of the instant spell.

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