Mausoleum Secrets
Instant
Undergrowth — Search your library for a black card with converted mana cost less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle your library.
イラスト：
Guilds of Ravnica Promos#75pレア英語適正
裁定
2018年10月5日
A land card that produces black mana, even a Swamp, normally has no color.
2018年10月5日
If a card in your library has 
in its mana cost, X is considered to be 0.
2018年10月5日
Creature cards with other types, such as artifact creature cards, count for undergrowth abilities.
2018年10月5日
Because tokens aren’t cards, they never count for undergrowth abilities.