Shu Yun, the Silent Tempest #52
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Card Details
Prowess
Whenever you cast a noncreature spell, you may pay 
. If you do, target creature gains double strike until end of turn.
3/2
Illustrated by David Gaillet
Rulings (4)
Nov 24, 2014
Any spell you cast that doesn't have the type creature will cause prowess to trigger. If a spell has multiple types, and one of those types is creature (such as an artifact creature), casting it won't cause prowess to trigger. Playing a land also won't cause prowess to trigger.
Nov 24, 2014
Once it triggers, prowess isn't connected to the spell that caused it to trigger. If that spell is countered, prowess will still resolve.
Nov 24, 2014
Prowess goes on the stack on top of the spell that caused it to trigger. It will resolve before that spell.
Nov 24, 2014
Prowess triggers only once for any spell, even if that spell has multiple types.
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