Reckless Bushwhacker
Creature — Goblin Warrior Ally
Surge 
(You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
Haste
When Reckless Bushwhacker enters the battlefield, if its surge cost was paid, other creatures you control get +1/+0 and gain haste until end of turn.
イラスト：
Oath of the Gatewatch#116アンコモン英語適正
裁定
Casting a spell for its surge cost doesn’t change its mana cost or its converted mana cost.
If an instant or sorcery spell cast for its surge cost is copied, the copy is also considered to have had its surge cost paid.
For some cards, surge represents only an alternative cost, a discount that applies if you or a teammate has cast another spell this turn. Other cards, like Reckless Bushwhacker, have additional abilities or effects if you paid the surge cost to cast the spell.
The other spell that you or a teammate cast can be one that’s resolved, one that was countered, or (for instants with surge) one that’s still on the stack.