Stonybrook Banneret
Creature — Merfolk Wizard
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Merfolk spells and Wizard spells you cast cost less to cast.
Made from trout scales and crawfish whiskers, merrows' shimmering banners flash in the water like lightning.
1/1
イラスト：
The Lost Caverns of Ixalan Commander#173コモン英語適正
裁定
2008年4月1日
A spell you cast that’s both creature types costs less to cast, not 
less.
2008年4月1日
The effect reduces the total cost of the spell, regardless of whether you chose to pay additional or alternative costs. For example, if you cast a Rogue spell by paying its prowl cost, Frogtosser Banneret causes that spell to cost less.