棘齿炸弹 
(Ratchet Bomb)
Text:
：在棘齿炸弹上放置一个充电指示物。，牺牲棘齿炸弹：消灭所有总法术力费用等同于棘齿炸弹上充电指示物数量的非地永久物。
Rulings:
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8/7/2020
Tokens that aren’t a copy of something else don’t have a mana cost. Anything without a mana cost normally has a converted mana cost of 0.
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8/7/2020
If a permanent has <img src="/Handlers/Image.ashx?size=small&name=X&type=symbol" alt="Variable Colorless" align="absbottom" /> in its mana cost, X is considered to be 0.
Legality:
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standard: Not legal
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future: Not legal
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historic: Legal
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pioneer: Legal
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modern: Legal
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legacy: Legal
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pauper: Not legal
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vintage: Legal
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penny: Legal
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commander: Legal
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brawl: Legal
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duel: Legal
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oldschool: Not legal
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gladiator: Legal
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premodern: Not legal
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historicbrawl: Legal
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paupercommander: Not legal
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alchemy: Not legal
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explorer: Legal
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predh: Legal
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oathbreaker: Legal
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timeless: Legal
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standardbrawl: Not legal
