オラン＝リーフのハイドラ
クリーチャー — ハイドラ
トランプル
上陸 ― 土地が１つあなたのコントロール下で戦場に出るたび、オラン＝リーフのハイドラの上に＋１/＋１カウンターを１個置く。その土地が森であるなら、代わりにオラン＝リーフのハイドラの上に＋１/＋１カウンターを２個置く。
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Duel Decks: Nissa vs. Ob Nixilis#16レア日本語適正
裁定
A landfall ability triggers whenever a land enters the battlefield under your control for any reason. It triggers whenever you play a land, as well as whenever a spell or ability puts a land onto the battlefield under your control.
When a land enters the battlefield under your control, each landfall ability of the permanents you control will trigger. You can put them on the stack in any order. The last ability you put on the stack will be the first one to resolve.
If the ability has an additional or replacement effect that depends on the land having a certain basic land type, the ability will check that land’s type as the ability resolves. If, at that time, the land that entered the battlefield is no longer on the battlefield, use its types when it left the battlefield to determine what happens.