原文Arixmethes isn't a land until after it has entered the battlefield. Effects such as that of Blood Moon won't affect its enters-the-battlefield ability. Similarly, replacement effects that modify how creatures you control enter the battlefield will see Arixmethes entering as a creature rather than a land. However, triggered abilities (such as landfall abilities) will see that a land has entered the battlefield and not a creature.
原文Arixmethes can tap for mana the turn it enters the battlefield as long as it has slumber counters on it. If you can figure out how to untap it, that is.
原文While Arixmethes is a land, it's still green and blue, it's still legendary, and its mana value is still 4.
訳文アリクスメテスは土地ですが、緑と青であり、伝説であり、マナの価値は 4 のままです。
2020/08/07
原文Arixmethes's effect causing it to be a land overwrites any earlier effects that gave it additional types. For example, a Phyrexian Metamorph that copies Arixmethes will be a land, not an artifact land, until its slumber counters are removed.
原文Arixmethes's triggered ability resolves before the spell that caused it to trigger, but after targets have been chosen for that spell. It resolves even if that spell is countered.